무리함수

A window washer dropped a squeegee from a platform 196 feet above the sidewalk Use the formula $t=\frac{\sqrt{h}}{4}$ to find how many seconds it took for the squeegee to reach the sidewalk.

After a car accident, the skid marks for one car measured 190 feet. Use the formula $s=\sqrt{24d}$ to find the speed of the car before the brakes were applied. Round your answer to the nearest tenth.

An accident investigator measured the skid marks of the car. The length of the skid marks was 76 feet. Use the formula $s=\sqrt{24d}$ to find the speed of the car before the brakes were applied. Round your answer to the nearest tenth.

The skid marks of a vehicle involved in an accident were 122 feet long. Use the formula $s=\sqrt{24d}$ to find the speed of the vehicle before the brakes were applied. Round your answer to the nearest tenth.

Landscaping Reed wants to have a square garden plot in his backyard. He has enough compost to cover an area of 75 square feet. Use the formula $s=\sqrt{A}$ to find the length of each side of his garden. Round your answer to the nearest tenth of a foot.

Landscaping Vince wants to make a square patio in his yard. He has enough concrete to pave an area of 130 square feet. Use the formula $s=\sqrt{A}$ to find the length of each side of his patio. Round your answer to the nearest tenth of a foot.

Gravity A hang glider dropped his cell phone from a height of 350 feet. Use the formula $t=\frac{\sqrt{h}}{4}$ to find how many seconds it took for the cell phone to reach the ground.

Gravity A construction worker dropped a hammer while building the Grand Canyon skywalk, 4000 feet above the Colorado River. Use the formula $t=\frac{\sqrt{h}}{4}$ to find how many seconds it took for the hammer to reach the river.

Accident investigation The skid marks for a car involved in an accident measured 216 feet. Use the formula $s=\sqrt{24d}$ to find the speed of the car before the brakes were applied. Round your answer to the nearest tenth.

Accident investigation An accident investigator measured the skid marks of one of the vehicles involved in an accident. The length of the skid marks was 175 feet. Use the formula $s=\sqrt{24d}$ to find the speed of the vehicle before the brakes were applied. Round your answer to the nearest tenth.

For the following exercises, determine the function described and then use it to answer the question.

An object dropped from a height of 200 meters has a height, $h(t),$ in meters after $t$ seconds have lapsed, such that $h(t)=200-4.9{t}^{2}.$ Express $t$ as a function of height, $h,$ and find the time to reach a height of 50 meters.

For the following exercises, determine the function described and then use it to answer the question.

An object dropped from a height of 600 feet has a height, $h(t),$ in feet after $t$ seconds have elapsed, such that $h(t)=600-16{t}^{2}.$ Express $t$ as a function of height $h,$ and find the time to reach a height of 400 feet.

For the following exercises, determine the function described and then use it to answer the question.

The volume, $V,$ of a sphere in terms of its radius, $r,$ is given by $V(r)=\frac{4}{3}\pi {r}^{3}.$ Express $r$ as a function of $V,$ and find the radius of a sphere with volume of 200 cubic feet.

For the following exercises, determine the function described and then use it to answer the question.

The surface area, $A,$ of a sphere in terms of its radius, $r,$ is given by $A(r)=4\pi {r}^{2}.$ Express $r$ as a function of $A,$ and find the radius of a sphere with a surface area of 1000 square inches.

For the following exercises, determine the function described and then use it to answer the question.

The period $T,$ in seconds, of a simple pendulum as a function of its length $l,$ in feet, is given by $T(l)=2\pi \sqrt{\frac{l}{32.2}}$ . Express $l$ as a function of $T$ and determine the length of a pendulum with period of 2 seconds.

For the following exercises, determine the function described and then use it to answer the question.

The volume of a cylinder , $V,$ in terms of radius, $r,$ and height, $h,$ is given by $V=\pi {r}^{2}h.$ If a cylinder has a height of 6 meters, express the radius as a function of $V$ and find the radius of a cylinder with volume of 300 cubic meters.

For the following exercises, determine the function described and then use it to answer the question.

The surface area, $A,$ of a cylinder in terms of its radius, $r,$ and height, $h,$ is given by $A=2\pi {r}^{2}+2\pi rh.$ If the height of the cylinder is 4 feet, express the radius as a function of $A$ and find the radius if the surface area is 200 square feet.

For the following exercises, determine the function described and then use it to answer the question.

The volume of a right circular cone, $V,$ in terms of its radius, $r,$ and its height, $h,$ is given by $V=\frac{1}{3}\pi {r}^{2}h.$ Express $r$ in terms of $V$ if the height of the cone is 12 feet and find the radius of a cone with volume of 50 cubic inches.

For the following exercises, determine the function described and then use it to answer the question.

Consider a cone with height of 30 feet. Express the radius, $r,$ in terms of the volume, $V,$ and find the radius of a cone with volume of 1000 cubic feet.

For the following exercises, determine the function described and then use it to answer the question.

An object dropped from a height of 200 meters has a height, $h(t),$ in meters after $t$ seconds have lapsed, such that $h(t)=200-4.9{t}^{2}.$ Express $t$ as a function of height, $h,$ and find the time to reach a height of 50 meters.