All Answers 358212 Answers

Here's the answer  to (1)

http://web2.0calc.com/questions/what-is-the-coefficient-of-nbsp-nbsp-in-nbsp_2

You COULD subtract   like this     3/4 - 3/4(1/5)

or you could just multiply.   If you USE 1/5 of the gas, then 4/5 is left    3/4  x 4/5 = 12/20 = 3/5 tank left

840sale  -(6.22 cost ) x 35 = 622.30 TOTAL PROFIT       or        17.78 profit on EACH PAIR    

If we take dx/dt of the x= distance equation we will get the velocity = 4t-16       When the car comes to a stop, the velocity = 0 , so setting this equation = 0 will give us t in seconds when the car stops:

4t-16 = 0     yields car stop at t= 4 seconds    NOW, going back to the DISTANCE BETWEEN equation with t= 4

x= 2t^2 - 16t +35    yields     32 -64 +35 = 3 meters between the car and the tree...so the car will NOT hit the tree, but stop 3 meters from it.

The distance the car travels is the difference between t= 0 and t= 4 for the distance between equation given

t=0  yields  35     t= 4 we found = 3     35-3 = 32 meters = distance car travelled

Im doing a tafel plot to get trying to get a unitless coeffecinet, It work if i solve the Ln itratively then subtract but not with the quotient rule :( but this leaves me with a unit to coeffecient which should be unit less 

ln2.66= 0.98

ln-0.79=-0.2303 

-0.2303+0.98=0.7497 number i want 

but 

...........................................

and then it clicks, i should be using the product rule not Quoteint as im adding not subtraction, why math should not be done a 1:22am :/ 

Hmmmm.... works for me.    Watch ABOVE the calculator to see if it is interpreting your input the way you intended....

A negative outside of the parentheses makes all the signs of the variables within the parentheses to switch. Putting the negative within the parentheses only makes that sole variable it is attached to negative.

$17.78

The Number Should Be 244,140,625

The accurate answer is= 4 113/120

Look up law of cosines and law of sines

12 employees working in an auto assembly plant for 7 days at 9 hours per day can produce 390 auto parts.
a) How many employees working for 21 days at 8 hours per day can produce 2340 auto parts?

63 hrs are required to produce  390 parts

2340 parts is 6 times as many  so it should require 6 * 63 =  378 hrs for 12 employees

But we only have 21 * 8 =  168 hrs

So.......the amount of work done by 12 employees for 378 hrs = the amount of work done by x employees for 168 hrs

12 * 378  =  168 * x

4536  = 168 * x     divide both sides by 168

27 = x        so.....we need 27 employees

b) How many auto parts can be produced by 20 employees working for 18 days at 7.5 hours per day?

Using data from the first problem, 12 employees working in an auto assembly plant for 7 days at 9 hours per day can produce 390 auto parts.

390 parts / 63 hrs = 130/21 parts per hr by 12 employees

So.......20 employees can produce  (20/12) (130/21) =  650/63  parts per hr

So  .......18 * 7.5 = 135 hrs   = hrs available

So....the total number of parts produced  for 135 hrs by 20 employees  =

Parts per hour *  hrs available =

(650/63) * 135   =  about 1392.8  parts

Make the fractions share a common base of 8. Therefore, 1/4=2/8/. '

Heres the work

2+6=8

8+2/8+1/=

8 3/8

Convert each mixed # to an imp. fraction:

2 1/4 + 6 1/8=

9/4 + 49/8 <--- There, now then when adding and subracting fractions, there needs to be a common denominator:

9/4 ---> 18/8 because 9 x 2 = 18

                                   4 x 2 =  8

so now, 18/8 + 49/8, add the numerators ---> 67/8

now simplify, 67/8 =  8 3/8

0.7240516597046811598

pretty sure thats it.

Let's express auto parts in terms of man-hours 

12 man x 7 days x 9hrs/day / 390 parts = 1.93846 man-hr / part

Now   a)    21 days x 8 hrs/day x ?men /  2340parts = 1.93846 man-hr/part  ???

                168 x ? / 2340 = 1.93846

                   ? =    1.93846 x (2340)/168 = 26.99  = ~ 27 EMPLOYEES

          b)    20 men x 18 days x 7.5 hours / ? parts  = 1.93846 man-hr / part

                                          20 x 18 x 7.5 /1.93846 = ? parts =  1392.85  =  ~ 1393 parts

thank you for your help

The number EXACTLY in the middle between 25 and 31   is  (25+31)/2 = 28 

-6 ≤  -4 - 2x     add 6, 2x to both sides

2x ≤  2       divide both sides  by  2

x ≤ 1

4 113/120 

4 99/140

You really haven't given us enough info to answer your question unless we make some assumptions

Assumptions   #1  All tests are weighted equally

                       #2   "A" is 93 % 0r better

                       #3   No extra credit

(98 + 85 + final )/ 3  >= 93

Final must be at least: 96  

Surface area  of the cylindrical part of the pencil =

Area  of the non-conical end +  area of the cylinder "side"

pi*r^2   +  2 pi* r * length  =

pi * (0.29cm)^2  + 2pi *(0.29cm) * (5cm)  =  about 9.37 cm^2      (1)

Surface area of the conical part = pi * r * (slant height of cone)  =

pi (0.29cm)(1cm)  = about .911 cm^2      (2)

So.....the total surface area is the sum of (1)  and (2)  =   about 10.28 cm^2  = about 10.3 cm^2