4x^2=81 how do I figure this out

Consider the exponential function f (x) = 1/2 (15^x), what is the value of the growth factor of the function? A 1/5 B 1/3 C 5 D 15

The Candle Factory is producing a new candle. It has a radius of 3 inches and a height of 5 inches. How much wax is needed to make the candle? Use 3.14 for. Round to the nearest whole cubic inch. Recall the formulas and.

Consider a graph of the equation y = 2x - 1. What is the y-intercept?

A bag contains three green Christmas ornaments and four gold ornaments. If you randomly pick two ornaments from the bag, at the same time, what is the probability that both ornaments will be gold?

Suppose that at Elkhorn High School, the number of hours per week that seniors spend on homework is approximately Normally distributed with a mean of 18.6 and a standard deviation of 6.0. Mrs.

What is the effective annual interest rate on a savings account that earns interest at a rate of 1.55% compounded monthly? A.) 1.29% B.) 1.55% C.) 1.56% D.) 1.59%

The measure of an angle is 56.6°. What is the measure of its complementary angle?

Marcos ran 5 2/4 miles on sat and 3 3/4 miles on monday, how much father did he run on sat

Lily said that n=3 is a solution of the equation 16+n=18. Is Lily correct? Explain

A country's population in 1991 was 114 million. in 1997 it was 120 million. estimate the population 2014 using the exponential growth formula. round your answer to the nearest million.