+0

# #7 Help. ​

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#7 Help. Feb 12, 2018

#1
+1

We know that the skid marks (d)= 150 feet.

S= speed in miles per hour (what we have to figure out)

0.75*150=112.5 (left side is now figured out)

Now we have to figure out s^2/30.25

Let's multiply both sides by 30.25

s^2*30.25/30.25=112.5*30.25

s^2=3402.125

Square root of 3402.125=58.3277378

Rounded: 58

Feb 12, 2018

#1
+1

We know that the skid marks (d)= 150 feet.

S= speed in miles per hour (what we have to figure out)

0.75*150=112.5 (left side is now figured out)

Now we have to figure out s^2/30.25

Let's multiply both sides by 30.25

s^2*30.25/30.25=112.5*30.25

s^2=3402.125

Square root of 3402.125=58.3277378

Rounded: 58

RainbowPanda Feb 12, 2018
#2
+2

Very nice, RainbowPanda  !!!   Feb 12, 2018
#3
+2

Can you help with number 8

NotSoSmart  Feb 12, 2018
#4
+2

Here's the graph of 8

It's the cube root function shifted 5 units to the right and 1 unit down

https://www.desmos.com/calculator/8neckfvbrw   Feb 12, 2018