Find the equation of the surface. the bottom hemisphere of a sphere centered at (8, - 7, 0) with radius 10.

Emily's vacuum cleaner has a power rating of 200 watts. If the vacuum cleaner does 360000 joules of work, how long did Emily spend vacuuming?

Abbey purchased a poster that had a height of 2 feet and width of 0.7 foot. What is the area of Abbey's poster?

Derive the equation from the parabola with a focus at (0,1) and a directrix of y=-1

A pizza restaurant offers 21 toppings. How many 5-topping pizzas can be created if each topping can be used only once?

Manny plans to save 1/14 of his salary each week. If his weekly is $504, find the amount he will save each week

5 (2x + 6) = 8x + 48 simplify.

If 30+12x represents the area of a partitioned rectangle, what could be expressions for the side lengths? List at least 5 possibilities

Jay Low received scores of 87 and 98 on his first two exams of the grading period. At least what score must jay earn on the next exam for the test average to be at least a 93 for the grading period?

Keenan made a large batch of lemonade for his team. He poured 72 cups of water into a large cooler. Then he added 1 cup of lemonade concentrate for every 2 quarts of water and mixed all of the liquids together.

The tree club plans to hike 20 miles today. The hikers have covered 6 miles so far. If they travel at an average speed of 2 1/2 how many hours will it take to complete the hike