The stem-and-leaf plot shows the ages of residents of a retirement home. how many residents are older than 80? ages of residents sandy ridge autumn care leaf stem leaf 1 3 4 6 0 2 1 3 3 5 6 7 2 4 5 6 6 6 8 2 4 4 4 7 9 8 1 2 2 4 1 1 6 6 8 8 9 9 1 2 9 9 9 0 10 0 1 2 a. sandy ridge, 6; autumn care 4 b. sandy ridge, 13; autumn care 11 c. sandy ridge, 8; autumn care 9 d. sandy ridge, 14; autumn care 12

What is the difference between the equations of a vertical and a horizontal line?

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

How many times larger is 9 × 10^8 than 3 × 10^-5? a. 3 × 10^13 b. 3 × 10^-40 c. 3 × 10^-13 d. 3 × 10^3