Solve a=2pir^2 2pirh for pi

1 answer:

7 0

A = 2 $\pi$ $r^{2}$ 2 $\pi$ rh |Divide by 4h $r^{3}$

$\pi ^{2}$ = $\frac{a}{4h r^{3} }$ |Square root on both sides

$\pi$ = $\sqrt{ \frac{a}{4h r^{3} } }$

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Trey has money saved for a school trip. He earns an additional $40 mowing lawns to add to his savings. Trey's parents give him e

serg [7]

Answer:

234 divided by 2 is 117, he had 117 when he saved up mowing lawns

Step-by-step explanation:

6 0

3 years ago

3,857 rounded to the nearest thousand

alekssr [168]

3,857:

1. 3 is located in the thousands place

2. Since 8 is bigger than 3, it's telling it to go up a number (turning 3 into a 4)

Stays the Same: 1,2,3,4
Goes Up: 5,6,7,8, etc.

So 3,857 is now rounded into 4,000

7 0

3 years ago

Read 2 more answers

What is the equation of a line passing through the points (-3,<br> -2) and (2, 0)?

Lostsunrise [7]

Answer:

$y=0.400x+-0.800$

Step-by-step explanation:

Given the following question:

point A = (-3, -2)
point B = (2, 0)

To write the equation of the line that passes through two points we have to write the points in slope intercept form.

Formula for slope intercept:

$y=mx+b$

M is equal to the slope of the two points, so first we need to fine the slope of the two points.

$(-3,-2)=(x1,y1)$
$(2,0)=(x2,y2)$

$m=\frac{y2-y1}{x2-x1}$
$m=\frac{0--2}{2--3} =\frac{2}{5}$
$m=\frac{2}{5} =0.400$

$y=mx+b$
$y=-2$
$m=0.400$
$x=-3$
$-2=0.400(-3)+b$
$0.400\times-3=-1.20$
$-2+1.2=-0.800$
$b=-0.800$

$y=0.400x+-0.800$

Hope this helps.