Which of the following is an example of the associative property? 1. 2(5 - 3) = 10 - 6
2. 11 + (6 + 8) = 11 + (28 + 6)
3. -7 + (19 + 5) = (-7 + 19) + 5
4. 1/3 • 3 = 1

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse