Percents
The population of Greenville increased by 7% from 2015 to 2016. If the 2016 population is k times the 2015 population, what is the value of k ?
k=1.07
Bacteria are growing in a liquid growth medium. There were 300,000 cells per milliliter during an initial observation. The number of cells per milliliter doubles every 3 hours. How many cells per milliliter will there be 15 hours after the initial observation?
9 600 000
Which expression is equivalent to (m^4q^4z^-1)(mq^5z^3) where m , q , and z are positive?
A) m^4q^20z^-3
B) m^5q^9z^2
C) m^6q^8z^-1
D) m^20q^12z^-2
B) m^5q^9z^2
sqrt((x-2)^2)=sqrt(3x+34)
What is the smallest solution to the given equation?
x=-3
Each year, the value of an investment increases by
0.49% of its value the previous year. Which of the
following functions best models how the value of the
investment changes over time?
A) Decreasing exponential
B) Decreasing linear
C) Increasing exponential
D) Increasing linear
C) Increasing exponential
The regular price of a shirt at a store is $11.70. The sale price of the shirt is 80% less than the regular price, and the sale price is 30% greater than the store’s cost for the shirt. What was the store’s cost, in dollars, for the shirt?
$1.80
Which expression is equivalent to a^(11/12) where a>0 ?
A) root(12)(a^132)
B) root(144)(a^132)
C) root(121)(a^132)
D) root(11)(a^132)
B) root(144)(a^132)