In the following exercises, solve. Round answers to the nearest tenth.
280. A ball is thrown vertically upward from the ground with an initial velocity of 122 ft/sec. Use the quadratic function
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- In the following exercises, solve. Round answers to the nearest tenth. 203. An arrow is shot vertically upward from a platform 45 feet high at a rate of 168 ft/sec. Use the quadratic equation h=16t2+168t+45 to find how long it will take the arrow to reach its maximum height, and then find the maximum height.arrow_forwardIn the following exercises, solve. Round answers to the nearest tenth. 278. A stone is thrown vertically upward from a platform that is 20 feet height at a rate of 160 ft/sec. Use the quadratic function h(t)=16t2+160t+20 to find how long it will take the stone to reach its maximum height, and then find the maximum height.arrow_forwardIn the following exercises, solve. Round answers to the nearest tenth. 279. A ball is thrown vertically upward from the ground with an initial velocity of 109 ft/sec. Use the quadratic function h(t)=16t2+109t+0 to find how long it will take for the ball to reach its maximum height, and then find the maximum height.arrow_forward
- A toy rocket shot upward from the ground at a rate of 208 ft/sec has the quadratic equation of h=16t2+208t . When will the rocket reach its maximum height? What will be the maximum height? Round answers to the nearest tenth.arrow_forwardIn the following exercises, solve. Rounding answers to the nearest tenth. 321. A ball is thrown upward from the ground with an initial velocity of 112 ft/sec. Use the quadraticequation h=16t2+112t to find how long it will take the ball to reach maximum height, and then find the maximum height.arrow_forwardSolve y(3y1)2=0 by using the Quadratic Formula.arrow_forward
- Solve 4t2+2t=20 by completing the square.arrow_forwardIn the following exercises, solve. Round answers to the nearest tenth. 284. A cell phone company estimates that by charging x dollars each for a certain cell phone, they can sell 8x cell phones per day. Use the quadratic function R(x)=x2+8x to find the revenue received when the selling price of a cell phone is x. Find the selling price that will give them the maximum revenue, and then find the amount of the maximum revenue.arrow_forwardIn the following exercises, solve. Round answers to the nearest tenth. 285. A rancher is going to fence three sides of a corral next to a river. He needs to maximize the corral area using 240 feet of fencing. The quadratic equation A(x)=x(2402x) gives the area of the corral, A, for the length, x, of the corral along the river. Find the length of the corral along the river that will give the maximum area, and then find the maximum area of the corral.arrow_forward
- A man throws a ball into the air with a velocity of 96 ft/s. Use the formula h=16t2+v0t to determine when the height of the ball will be 48 feet. Round to the nearest tenth.arrow_forwardIn the following exercises, solve. Round answers to the nearest tenth. 281. A computer store owner estimates that by charging x dollars each for a certain computer, he can sell 40x computers each week. The quadratic function R(x)=x2+40x is used to find the revenue, R, received when the selling price of a computer is x, Find the selling price that will give him the maximum revenue, and then find the amount of the maximum revenue.arrow_forwardA man throws a ball into the air with a velocity of 96 ft/sec. Use the formula h=16t2+v0t to determine when the height of the ball will be 48 feet. Round to the nearest tenth of a second.arrow_forward
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