21 billion is how much more than 9.8 billion write scientific notation

If you have 5 hotdogs and you ate 3 how many do you have left

Suppose the probability of getting the flu is 0.20, the probability of getting a flu shot is 0.60, and the probability of both getting the flu and a flu shot is 0.10.

Line e has a slope of 7/4 line f is parallel to line e what is the slope for line f

A jewellery store sells 240 necklaces in a month. 180 of the necklaces were sold via the shop's website, the rest were sold in a high street shop. Work out the ratio of online sales to shop sales. Give your answer in its simplest form.

Madison freezes 5 pounds of green beans In plastic bags. Each bag holds 3/4 pound of green beans. How many bags full of green beans dose Madison freeze A. 5 1/3 B. 3 3/4 C. 4 1/4 D. 6 2/3

Given the explicit formula for an srithmetic sequence find the first five terms and the 52nd term

Negative three plus x equals eleven

A rectangular room has a length of 20 ft, width of 48 ft, and height of 10 ft. Use the Pythagorean Theorem to find length BC and length AB. Round to the nearest tenth, if necessary.

The Hu family goes out for lunch, and the price of the meal is $58. The sales tax on the meal is 7%, and the family also leaves a 15% tip on the pre-tax amount. What is the total cost of the meal?

Suppose the university bursar said that 600 students entered for Business Mathematics, 300 entered for Statistics while 173 students entered for both Business Mathematics and Statistics. How many students enrolled in the two courses altogether?