stephdp

28 Questions
1 Answers

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1326

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After years of overhunting, environmental scientists have reintroduced lynx to Yellowstone National Park. The initial number of lynx reintroduced to the park was 2,000; after 10 years, the population is estimated to be around 3,750. Assuming an exponential read more ..

stephdp Feb 26, 2016

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1787

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+109

The population of a particular city is given by the function P(t) = 57,100(1.025)^t, where t is time in years and P(t) is the population after t years. What

The population of a particular city is given by the function P(t) = 57,100(1.025)^t, where t is time in years and P(t) is the population after t years. What is the current population, the percentage growth rate, and the population size (rounded to the nearest read more ..

stephdp Feb 26, 2016

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1622

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+109

A student is asked to calculate the Pythagorean Triples for the number 9 using the identity (x2 − y2)2 + (2xy)2 = (x2 + y2)2. The

A student is asked to calculate the Pythagorean Triples for the number 9 using the identity (x2 − y2)2 + (2xy)2 = (x2 + y2)2. The student's steps are shown below.
Step 1: 9 = 5^2 − 4^2; therefore, read more ..

stephdp Feb 24, 2016

0

1435

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+109

help:/

The population of a particular city is given by the function P(t) = 125,000(1.015)^t, where t is time in years and P(t) is the population after t years. What is the current population, the percentage growth rate, and the population size (rounded to the read more ..

stephdp Feb 24, 2016

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1288

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Two competing passenger trains create a new marketing plan, charging passengers a fixed amount and then a rate per mile. Fast Track: $59.50 plus $0.40 a mile

Two competing passenger trains create a new marketing plan, charging passengers a fixed amount and then a rate per mile.
Fast Track: $59.50 plus $0.40 a mile
Cheap Track: $379.50 plus $0.30 a mile
A one-way train ride from New York to Seattle is read more ..

stephdp Feb 24, 2016

+5

1351

1

+109

HelpD;

After years of overhunting, environmental scientists have reintroduced beavers into Yellowstone National Park. The initial number of beavers reintroduced to the park was 3,100; after 12 years, the population is estimated to be around 9,750. Assuming an read more ..

stephdp Feb 23, 2016

+5

1569

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+109

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An investment is advertised as returning 4.5% every 6 months (semiannually), compounded semiannually. If $30,000 is invested, the growth can be modeled by the equation A(t) = 30,000(1.045)^2t. What is the equivalent annual growth rate for this investment read more ..

stephdp Feb 23, 2016

+5

1662

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+109

help me:(

The number of hours, t, that bacteria spread 10-fold can be modeled by the equation B(t) = B0(10)^5t. There are 25 bacteria present initially and a biologist wishes to find out how many hours will elapse until there are 5,000 bacteria present. What is the read more ..

stephdp Feb 23, 2016

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821

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+109

:(((((

graph the following system of equations. which has two real solutions?
a.) y=x^2-2 y=-2x-5
b.) y=x^2-2 y=-2x-4
c.)y=x^2-2 y=-2x-1 read more ..

stephdp Feb 21, 2016

0

762

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+109

help me?

what is the equations for the quadratic function graphed below?
a.) y=3(x+4)^2-5
b.)y= -3(x+4)^2+5 read more ..

stephdp Feb 21, 2016

0

1304

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+109

4x^2 - 24x + 31 = 0 solve by completing the square?

4x^2 - 24x + 31 = 0 solve by completing the square?
A.) -3 + square root of 5/4, x=-3 - square root of 5/4
B.) x= 3 + square root of 5/4, x= 3 - square root of 5/4
C.) 1+ square root of 3/2, 1- square root of 3/2 read more ..

stephdp Feb 21, 2016

0

763

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+109

help me?:(((

is it 21 square root of 5, irrational or
47.0 rational? read more ..

rarinstraw1195 ●●

stephdp Feb 21, 2016

0

857

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+109

A motorcycle is depreciating at 19% per year, every year. A student's $21,000 motorcycle depreciating at this rate can be modeled by the equation V(t) =

A motorcycle is depreciating at 19% per year, every year. A student's $21,000 motorcycle depreciating at this rate can be modeled by the equation V(t) = 21,000(0.81)^t. What is an equivalent equation for this vehicle as a monthly depreciation and, using read more ..

stephdp Feb 18, 2016

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1012

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title

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stephdp Feb 18, 2016

0

1435

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+109

The number of hours, t, that bacteria spread 10-fold can be modeled by the equation B(t) = B0(10)^7t. There are 20 bacteria present initially and a biologist

The number of hours, t, that bacteria spread 10-fold can be modeled by the equation B(t) = B0(10)^7t. There are 20 bacteria present initially and a biologist wishes to find out how many hours will elapse until there are 3,340 bacteria present. What is the read more ..

stephdp Feb 18, 2016

0

1801

1

+109

The amount of polonium-210 remaining, P(t), after t days in a sample can be modeled by the exponential function P(t) = 100e^−0.005t, where 100 represents the

The amount of polonium-210 remaining, P(t), after t days in a sample can be modeled by the exponential function P(t) = 100e^−0.005t, where 100 represents the initial number of grams in the sample. What is an equivalent expression, written as a percentage read more ..

stephdp Feb 18, 2016

+109

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stephdpFeb 17, 2016