Mark bought a concert ticket for $88, then sold it for $121. By what percent did he mark the ticket up?

John has taken out a loan for college. He started paying off the loan with a first payment of $100. Each month he pays, he wants to pay back 1.1 times as the amount he paid the month before.

A researcher wanted to compare the final test scores of students who used two different types of study materials. The researchers randomly selected two samples of 20 students using each type of material

Identify the 34th term of the arithmetic sequence 2, 7, 12

What is the rate of change for y=3x-1

The girls want to have streamers of ribbons hanging from the entrance door. they plan to put 11 six foot long ribbons on the door. The ribbons comes in 24-foot long rolls. how many rolls do they need?

What is the next fraction in 15/100,3/10,45/100,6/10,75/100

In January, Desmond begins saving $25 per month for a used car. Each month, he is able to save $5 more than the previous month. After how many months will Desmond first have enough money to purchase a $3,000 used car?

Can someone explain how $3.79 x 2 = $7.58 is equivalent to $7.58/2=$3.79

Three highways connect city A with city B. two highways connect city B with city C. during rush hours, each highway is blocked by a traffic accident with probability 0.2, independently of other highways.

The weights of laboratory cockroaches follow a normal distribution with mean 80 grams and standard deviation 2 grams. about what percent of the cockroaches have weights between 76 and 84 grams?