Which of the following is a true statement about functions? a. if a and b are matrices, then ab = a+b. b. if f and g are functions, then (fog)(3)=(gof)(3) c. if f is a function, then f(3h)=3f(h) d. if f and g are functions, then (f+g)(1)=(g+f)(1)

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2