If , then n=
A formula used to compute the current value of an investment account is A = P(1 + r)n, where A is the current value, P is the amount deposited, r is the rate of interest for 1 compounding period, expressed as a decimal, and n is the number of compounding periods. Which of the following is closest to the value of an investment account after 3 years if $8,000 is deposited at 5% annual interest compounded annually?
（A）$8,400 （B） $9,261 （C） $15,730 （D） $25,200 （E） $33,463
Correct Answer: B
The graph of y2 = x is shown in the standard (x,y) coordinate plane below for values of x such that 0 ≤ x ≤ 4. The x-coordinates of points D and E are both 4. What is the area of ΔDEO, in square coordinate units?
（A） （B） 4 （C） 8 （D） 12 （E） 16
Correct Answer: C
What is the value of x when 2x + 3 = 3x – 4 ?
Correct Answer: E
More ACT Math Exam Questions
- 1What is the slope of the line given by the equation 3x + 4y = -12 ?
- 2For all x, x2 - (3x - 2) + 2x(4x - 1) = ?
A magician performing at children's birthday parties charges $120.00 total for a one-hour performance with ten goodie bags for children at the party. She will provide additional goodie bags for $2.50 each. For an additional $25.00, she will also present a 15-minute laser light show. The magician is always paid on the day of the show, receives no tips or other additional payments, and never varies the length of the show. If the magician performs exactly four shows one weekend, presents the light show at three of those performances, and collects $635.00 total, how many additional goodie bags did she provide?
- 4For triangle ABC, m ∠a = 75° and m ∠b = 36°. Which segment of triangle ABC is the longest?
The equation is true for what real value of a?