If p = log2(x), what is the value of log2(2x^3) in terms of p?
A. 6p
B. 2p^3
C. 1 + 3p
D. 3 + 3p
E. 1 + p^3
log2(2x^3) = log2(2) + log2(x^3)
log2(2) = 1, so we have:
log2(2x^3) = 1 + 3log2(x)
Since we're given log2(x) = p, we have:
log2(2x^3) = 1 + 3p - Answer C
The ratio of the measures of the 3 angles of a triangle is 1:2:3. What is the measure of the largest angle in degrees?
Let the smallest angle be x.
Then we have 3 angles based on the ratio: x, 2x, 3x
We know the sum of the angles of a triangle equals 180. So we have:
x + 2x + 3x = 180
6x = 180...
What fraction lies exactly halfway between 2/3 and 3/4?
A) 3/5
B) 5/6
C) 7/12
D) 9/16
E) 17/24
Halfway means taking the average, which is dividing the sum of the fractions by 2 for 2 fractions:
1/2(2/3 + 3/4)
1/2(2/3) + 1/2(3/4)
1/3 + 3/8
We need common denominators, so we type this fraction...
If a, b, and c are positive integers such that a^b = x and c^b = y, then xy = ?
A) ac^b
B) ac^2b
C) (ac)^b
D) (ac)^2b
E) (ac)^b^2
xy = a^b * c^b
We can use the Power of a Product Rule
a^b * c^b = (ac)^b
Therefore:
xy = (ac)^b - Answer C
Given f = cd^3, f = 450, and d = 10, what is c?
A) 0.5
B) 4.5
C) 15
D) 45
E) 150
Plugging in our numbers, we get:
c(10)^3 = 450
Since 10^3 = 1000, we have:
1000c = 450
Typing this equation into our search engine, we get:
c = 0.45 Answer B
On a particular road map, 1/2 inch represents 18 miles. About how many miles apart are 2 towns that are 2 1/2 inches apart on this map?
A) 18
B) 22 1/2
C) 36
D) 45
E) 90
Set up a proportion of inches to miles where m is the number of miles for 2 1/2 inches. Note: 1/2 = 0.5 and 2 1/2 = 2.5...