Can someone explain Scientific Notation

Of 60 books on a bookshelf, 24 are nonfiction. What percent of the books are nonfiction?

How do u find the absolute value

Cos (a-b) = cos a cos b + sin a sin b for all values of a and b. True or False

Look at these sets of ordered pairs. W) { (8, 9), (2, 3), (0, - 2), (10,-9) } X) { (0, 0), (5, 10), (-3, 3}} Y) { (1, 1), (2, 2), (3, 3), (4,4) } z) { (-10, 1), (-9, 3), (-4,5) } Which of the sets represent functions?

The "off-peak" weekly average cost of hiring a caravan in Wales is 520. In July the average cost increases to 800. calculate the percentage increase in cost. Give your answer to 2 significant figures.

Round 45,122 to the nearest thousand

The function f (x) = - 3x2 + 36x - 119 written in vertex form is f (x) = - 3 (x - 6) 2 - 11. Which statements are true about the graph of f (x) ? Check all that apply. The axis of symmetry is the line x = 6. The vertex of the graph is at (-6, - 11).

200 cans of food were distributed to 3 charity homes. 2/5 of the cans were given to the first home, 1/3 of the remainder to the second home and the rest to the third home. How many cans did the third home receive?

A car dealer earns a 4% Commission on all cars sold last month he earned $7,000 in commission he wants to earn $8,000 in commission this month what increase is total sales from last month total sales does he need in order to reach a go for this

The charge for a bicylce repair was $9.28 for parts, 1/4 hour of labor at $18 per hour, and a $2 shop fee. What was the total cost (c) of the repair?