Find value of: cot^-1 (4)

(inverse of cotangent). Give the reason of using cosine to evaluate.

One third of your class of 18 students likes vanilla frozen yogurt. How many students in your class like vanilla frozen yogurt?

If I buy one 6-pack of soda can fizzy candy for $1.25 Then how much will it be if I bought 25 6-packs of the candy.

A case of chocolate contains 15 chocolate bars. The chocolates come in three varieties milk, dark, and milk/dark mix. 6 milk chocolates and 3 dark chocolates become expired.

The quotient k and 22 is - 66.

The orbit of earth around the sun is about 5.8 X 10^8, while pluto's orbit is about 2.3. X 10^10 miles. About how many miles longer is pluto's orbit than earth's orbit?

The sum of a block of land's length and width is 30m. If x = the width the expression for the land's length is 30 - x. Given the length and width must be positive values, solve an appropriate inequality to find the possible values of x.

Jacqueline wants to travel to Oregon. She rents a car for $50, plus $0.10 per miles. Jacqueline paid a total of $195. How many miles did she drive?

25 1/2 divided by 6 In this math equation I don't know how to do it

What is three and one-eights minus one and seven-eights?

Solve 5x-4=5 (x-3) + 11