The recursive formula a2=18.5, an-1+1.5 models the number of people, in millions, that own a smartphone in the US, n years after 2014. Write an equivalent explicit formula for the situation.

A figure is made from 8 unit blocks. It is 3 units tall. What is the maximum length the figure could be? Explain.

Macs hotel had 128 rooms, and 25% of the rooms in the hotel did not have an ocean view. Write an expression to find the total number of rooms in the hotel that had an ocean view.

At Hoffman's Bike Rentals, it costs $38 to rent a bike for 7 hours. How many dollars does it cost per hour of bike use

What is the value of n so that the expression x^2 + 11x + n is a perfect trinomial? a) 11 b) 25 c) 30.25 d) 36

The perimeter of a square must be greater than 148 inches but less than 196 inches. Find the range of possible side lengths that satisfy these conditions. (Hint: The perimeter of a square is given by P=4s, where s represents the length of a side).

What is a reasonable estimate of - 3 4 5 + (-5.25) and the actual value?

a restaurant holds 150 diners. when you arrive and are finally seated, the resterant is 2/5 full how many diners are in the restaurant

How many times does 46 go into 351

The circumference of a circle is 16Pi ft. The radius is ft.

Write equation and solve. Half of your baseball card collection got wet and was ruined. You bought 15 cards to replace some that were lost. How many did you begin with if you now have 38 cards