Jessica can do 10 multiplication problems in 5 seconds. what is the unit rate?​

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

What is the sum of the first 8 terms of the geometric series

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations