The amount of money in an investment is modeled by the function A(t) = 500(1.0605)'. The variable A represents the investment balance in dollars, and t the number of years. What is the doubling time for the investment? Round answer to 1 decimal place. Answer = years Calculator

The resistance of a copper wire carrying an electrical current is directly proportional to its length and inversely proportional to its cross-sectional area. A copper wire with a diameter of 0.0126inch has a resistance of 64.9ohms per thousand feet. What length of 0.0201-inch-diameter copper wire will produce a resistance of 33.5ohms?

Round 0.42538 to 2 decimal places.

Round each percentage increase or decrease that you calculate to the nearest tenth of a percent. Percentage ChangeAn investment declines in value by 2 each month. By what percentage does its value declines in a year?

The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of radioactive actinium will remain after 19 years?

Graph the function h(x)=2ln(93x)+1.

A radiation safety officer is working with 112 grams of a radioactive substance. After 17 days, thesample has decayed to 80 grams. Rounding to fivesignificant digits, write an exponential equationrepresenting this situation. To the nearest day, whatis the half-life of this substance?