so the question is asking about the time from 1500 feet to 1100 feet. How long did they fall, w/o a parachute. aka "freefall" so, at 1500 feet the jumper is really at time zero. so, plug in to the formula

1100 = -16 $x^{2}$ +1500

( x represents seconds so i'll change it to t so we know it's time )

1100 = -16 $t^{2}$ + 1500

now we can solve for t , to see how long the jumper falls

-400 = - 16 $t^{2}$ ( subtracting 1500 from both sides of equation )

25 = $t^{2}$ ( dividing both sides by -16 )

oh.. look at how nice that turns out.. :)

$\sqrt{25}$ = t ( take the square root on both sides )

5 = t

the jumper fell for 5 seconds to get to 1100 feet

5 0

3 years ago

Triangle ABC has vertices at A(–2, 3), B(–3, –6), and C(2, –1). Is triangle ABC a right triangle? If so, which angle is the righ

levacccp [35]

Answer:

Yes, the right angle is angle C.

Step-by-step explanation:

The given triangle has vertices at A(–2, 3), B(–3, –6), and C(2, –1).

Recall the slope formula;

$m=\frac{y_2-y_1}{x_2-x_1}$

The slope of the line going through AC is

$m_{AC}=\frac{-1-3}{2--2}=-1$

The slope of the line going through BC s

$m_{AC}=\frac{-1--6}{2--3}=1$

The product of the slopes of AC and BC is $-1\times1=-1$

This means line AC is perpendicular to BC at C.

Hence the triangle ABC is right angled at C.

6 0

3 years ago

Read 2 more answers

Find the y intercept of the line 5x-2y=30

dalvyx [7]

Y= -15

That would be the y-intercept, I hope this helps

6 0

3 years ago

Fill in the blank

Alika [10]

Answer:

commutative property

Step-by-step explanation:

The commutative property basically states that a+b=b+a and a*b=b*a

4 0

3 years ago