Determine the sign of cos pi/3 without using a calculator.

The life expectancy (in hours) of an electric bulb is normally distributed with a mean of 5000 and a standard deviation of 1000. Find the probability that a bulb lasts for more than 6300 hours. Round answer to four decimal places.

At midnight, the temperature was 3° C. By 6:00 A. M., the temperature dropped by 7° C. What was the temperature at 6:00 AM.? A - 10° C B C D. 10°C

Given the function f (x) = log3 (x + 4), find the value of f-1 (3

A company sells cereal in two different - sized boxes. The smaller box has the dimensions of 12-inch, 2-inch and 7 3/4 i. The height of the smaller box is 80% of the height of the lager box, while the other two dimensions are the same for both boxes.

A circle is inside a square. The radius of the circle is decreasing at a rate of 4 meters per minute and the sides of the square are decreasing at a rate of 1 meter per minute.

Vector A and Vector B have the same direction, and they both have a magnitude of 6. What must be true about Vector A and Vector B? a. They are equal and parallel. b. They are opposites, but not parallel. c. They are opposites and parallel. d.

W is greater than - 8 and less than 8 using inequalities

Solve the linear inequality 4.2y+2.1>-2.52

What is the product of 5ab and (-2a²b) ³? -40a^6b^4 -30a^7b^4 -40a^7b^4 -30a^6b^4

How do I find the surface area of a a triangular prisim