chasead1213 chasead1213

25-02-2021
Mathematics

contestada

A rocket is launched from a tower. The height of the rocket, y in feet, is related to the
time after launch, x in seconds, by the given equation. Using this equation, find the
time that the rocket will hit the ground, to the nearest 100th of second.
y = -16x^2 + 148x + 128

Respuesta :

merhog1004 merhog1004

03-03-2021

Answer:

10.05

Step-by-step explanation:

-16x2+148x+128=0 (we can divide out a -4 )

4x2-37x-32=0, (now use the quadratic formula)

(37±sqrt(372-4(4)(-32))/(2*4)=x, x=10.046 & x=-.796

Answer Link

Otras preguntas

Plz help with this one

You begin solving the equation 3+4x=51 by subtracting 3 from both sides. Which is the best choice for Step 2? Subtract 48 from both sides. Multiply bot

At a certain time, the length of a rectangle is 5 feet and its width is 3 feet. At that same moment, the length is decreasing at 0.5 feet per second and the wi

When the average price level in the united states, relative to the average price levels in other countries, rises, this tends to raise imports and lower exports

Bell inc. took a physical inventory at the end of the year and determined that $780,000 of goods were on hand. in addition, bell, inc. determined that $60,000 o

If real gdp increases by 1 percent next year and the price level goes up by 3 percent, by how much will nominal gdp increase?

Solve the triangle. A = 54°, b = 11, c = 8 options: No triangles possible a ≈ 13.4, C ≈ 49.6, B ≈ 76.4 a ≈ 13.4, C ≈ 45.6, B ≈ 80.4 a ≈ 9, C ≈ 45.6, B ≈ 8

The "internet of things" refers to: a. the rise in mobile gaming. b. a vision of a pervasive web in which common objects are connected to and controlled over th

What is the similarity ratio of the smaller to larger similar cylinders? smaller cylinder r=12 height=20 larger cylinder r=18 height=30

The lengths of the sides of a right triangle are a and b, and the hypotenuse is c. find the area of the triangle. a=2 squareroot 3; c=4 a = sq. ft.