A circular oil spill continues to increase in size. The radius of the oil spill, in miles, is given by the function r(t) = 0. 5 + 2t, where t is the time in hours. The area of the circular region is given by the function a(r) = πr2, where r is the radius of the circle at time t. Explain how to write a composite function to find the area of the region at time t.

i dont know sorry

step-by-step explanation:

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

the correct answer is b. negative exponential growth.

step-by-step explanation:

you can tell it's an exponential function because it decreases rapidly then levels out and never touches the x-axis.

it is negative because the y-axis decreases as the x-axis increases.

therefore it is a negative exponential growth graph.

hope i !

191 students play sports and ninety-seven 10th graders were surveyed.

step-by-step explanation: