Aline slope of 8 and includes the points (-4,f) and (-5,-4) what is the value of f

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

Luisa sells stuffed animals. she sells her stuffed elephant for $34.90, and the sales tax is 6% of the sale price. about how much is the sales tax on the elephant?