samgelinas

neebette:

What is the volume of the earth if the radius is 3690 mi.
I thought the formula to find the volume for a sphere is V=4xRxRxRxPI / 3 am I wrong?

Melody:

Quote:

You have to forget the negative 7, you don't need it . You'll need it only if you are in a grafic...

The -7 can only be dismissed because Mthsmename has stated that it is a pythagorean question and a side length cannnot be negative.
If it was just a straight algebra question the -7 could not be dismissed. I know that you know this already Sam.

Interesting username you have there Mthsmename. You could sign up and make it official

Mthsmename:

24squared + b squared = 25squared

s07778673:

:x find the area of similar figures

324394:

320/3what is 320/3

kiki:

there are 90 pens in 5 boxes we need 216 more pens how many boxes will we order

kbby:

how to change a fraction to a percent

Melody:

CountryGirl333:

Find the height of a triangular prism with a base length of 10 yards, a base height of 20 yards, and a volume of 600 cubic yards.

Sorry Sam but it is a prism NOT a pyramid so you have used the wrong formula.

The volume of any prism is the area of the cross section (that stays the same) times by the depth, or height or whatever you want ot call it.

I think it is the height of the triangle that is missing although the question could be interpreted differently. The area of a triangle is (1/2)*base*height = (1/2) * 10 * h = 5h yards squared

so
5h*20=600
and you can finish it.

amber6198:

:? The logistic growth function f(t)=67000/1+1339.0e^-0.11t models the numbers of people who have become ill with a particular infection t weeks after its initial outbreak in a particular community. How many people become ill with this infection when the epidemic began?
A) 67,000 people
B) 1340 people
C) 50 people