A skateboarder goes off of a ramp at a speed of 52 ft./s. The ramp is 5 ft. above the ground with a 30° angle of elevation. Which set of parametric equations represents the skater's jump? The acceleration due

to gravity is 32 ft/s^2.

We need an equation for the horizontal motion and another for the vertical motion.

First, let's look at the vertical motion.

Once the skateboarder is on the air, the only force acting on him/her will be the gravitational force, then the vertical acceleration is the gravitational acceleration.

Ay(t) = -32ft/s^2

Where the negative sign is because this acceleration pulls down the skateboarder.

To get the vertical velocity, we need to integrate over time, so we get:

Vy(t) = (-32ft/s^2)*t + v0

Where v0 is the vertical velocity.

To know the vertical velocity, we use the fact that:

When the skateboarder jumped, the velocity was 52ft/s, and the angle was 30°.

Then the initial velocity in the y-axis (the vertical one) as:

Vy = 52ft/s*sin(30°)

and the initial velocity on the x-axis is:

Vx = 52ft/s*cos(30°)

Replacing that in the vertical velocity equation:

Vy(t) =  (-32ft/s^2)*t + 52ft/s*sin(30°)

We need to integrate again to get the position equation:

Py(t) = (1/2)*(-32ft/s^2)*t^2 + 52ft/s*sin(30°)*t + p0

Where p0 is the initial vertical position, this would be the height of the ramp, which is 5ft

Then the equation of the vertical motion is:

Py(t) = (1/2)*(-32ft/s^2)*t^2 + 52ft/s*sin(30°)*t + 5ft

For the horizontal motion, we don't have any force, then the acceleration is:

Ax(t) = 0

The velocity is:

Vx(t) =  52ft/s*cos(30°)

And the position equation is:

Px(t) =   52ft/s*cos(30°)*t + p0

Where p0 is the initial horizontal position, we can assume that is zero, then:

Px(t) =   52ft/s*cos(30°)*t

Then the two equations that represent the skater jump are:

Py(t) = (1/2)*(-32ft/s^2)*t^2 + 52ft/s*sin(30°)*t + 5ft

Px(t) =   52ft/s*cos(30°)*t

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.