If the integral from 0 to pi/2 of sec^2 (x/k) dx = k find k, where 0 < = k < = pi.

A group of 72 students went on a field trip. The students traveled in vans, with an equal amount of boys and girls in each van. If 42 boys went on the trip, how many vans were there?

Peyton is moving and must rent a truck. In addition to an initial fee, the rental company charges a fee of $3 per mile driven. If Peyton were to drive 5 miles, the total cost would be $60.

A class of 4th grader sold tickets to their school play. Each of the 23 students in the class sold 4 tickets. The cost of each ticket was $ 7. How much money did the class earn by selling tickets to the play?

3 with an exponent of x equals 81. What is x?

Which ordered pair represents the y-intercept of the graph of the equation у = - 5 х + 6? A. (6,0) B. (0,6) C. (0,-5) D. (-5,0)

Which expression is equivalent to the expression below? (4x + 2y - z) - (x - y + 7)

13y-7y=9 Solve for y, write it as a reduced fraction.

In a family with 7 children, excluding multiple births, what is the probability of having exactly 2 girls? Assume that having a boy is as likely as having a girl at each birth.

A baseball player hit 65 home runs in a season. Of the 65 home runs, 19 went to right field, 23 went to right-center field, 9 went to center field, 11 went to left-center field, and 3 went to left field.

How many milliliters of olive oil (D=0.92 g/mL) have the same mass as 1.80 L of gasoline (D=.74 g/mL)