How do you write 9,900 in scientific notation?

Adrian and his children went into a bakery and where they sell donuts for $1.50 each and brownies for $2.50 each. Adrian has $40 to spend and must buy a minimum of 20 donuts and brownies altogether.

The sum of a positive number and a negative number is positive when ...

If n = 4p, where p is a prime number greater than 2, how many different positive even divisors does n have, including n?

Sarah uses 5 1/2 cups of flour for every 2 loaves of bread she bakes. What is the unit rate per loaf?

A swim team ordered 36 jackets that each cost the same amount. The total cost of the order was $1,116. Let c = the cost of each jacket.

Find the possible values for s in the inequality 12s - 20 ≤ 50 - 3s - 25.

14. Favorite School Subject Math 15% Science 20% English 35% History 30% Jenn recorded the favorite school subject of students at her school. She surveyed 700 students. How many more students chose English than Science?

The population of gray wolves in Wisconsin increased from 570 in 2007 to 660 in 2014. Find the percent increase in the wolf population.

Does the table represent an exponential function? Yes or No.

5. George usually hits 5 out of 14 balls he is pitched. If he is pitched 45 balls, how many should he hit?