What type of function maps an input onto itself?

a. opposite function b. negative function c. identity function d. reflective function

How many of the numbers from 10 through 97 have the sum of their digits equal to a perfect square?

A train is traveling at a constant speed of 105 miles per hour. How many feet does it travel in 4 seconds? Remember that 1 mile is 5280 feet.

A box contains 5 blue chips and 11 red chips. a person selects two chips without replacement, find the probability of selecting 2 blue chips?

Water is pouring into a container at a rate given by ri = t^3 (gallons/hour), and water is pouring out of the same container at a rate given by ro (t) = e^t (gallons/hour).

A map of Colorado says that the scale is 1 inch to 20 miles or 1 inch to 1,267,200. Are these two ways of reporting the scale the same? Explain your reasoning.

Blank is 5 times as much as 27

Find the distance, in feet, a particle travels in its first 4 seconds of travel, if it moves according to the velocity equation v (t) = - t2 + 4 (in feet/sec). 55 over 3 16 over 3 16 12

Simplify this expression. 5^6 : 5^4 A. 2 B. 5 C. 10 D. 25

Caitlin wants to read for 90 minutes so far she has read 30% of her how much more longer does she need to read

A family went to a baseball game. They parked the car in a parking lot which charged $20. The cost per ticket was $28. Write an equation for the total cost of going to the baseball game, where y is the total cost and x is the total number of people.