Percents and Percent Change
A. 22%
B. 33%
C. 66%
D. 78%
D. 78%
How many seconds are in 32 minutes?
1920
What is the equation for calculating the percent change?
percent change = ((new value - old value) / old value) *100%
A printer produced posters at a constant rate of 42 posters per minute. At what rate, in posters per hour, does the printer produce the posters?
2520 posters per hour
What happens to the mean of a set of data if we remove the highest data point?
The mean will decrease
In a sample, 80% of the items are faulty. There are 88 faulty items in the sample. How many total items are in the sample?
110 items
The international space station orbits Earth and an average speed of 4.76 miles per second. What is the space station's average speed in miles per hour?
A. 285.6
B. 571. 2
C. 856.8
D. 17,136.0
D. 17,136.0
15, 14, 18, 17, x
The mean and the median of the five numbers above are equal. Which of the following is NOT a possible value of x?
A. 6
B. 11
C. 16
D. 21
A. 6
A number n is increased 6%. If the result is 318, what is the value of n?
A. 199
B. 299
C. 300
D. 337
C. 300
The density of a certain type of wood is 353 kilograms per cubic meter. A sample of this type of wood is in the shape of a cube and has a mass of 345 kilograms. To the nearest hundredth of a meter, what is the length of one edge of this sample?
A. 0.98
B. 0.99
C. 1.01
D. 1.02
B. 0.99
Data set A consists of 10 positive integers less than 60. The list shown gives 9 of the integers from data set A.
43, 45, 44, 43, 38, 39, 40, 46, 40
The mean of these 9 integers is 42. If the mean of data set A is an integer that is greater than 42, what is the value of the largest integer from data set A?
52
The expression 0.35x represents the result of decreasing a positive quantity x by what percent?
A. 3.5%
B. 35%
C. 6.5%
D. 65%
remember: new value = old value * (1- k%)
D. 65%
A certain park has an area of 11,863,808 square yards. What is the area, in square miles, of this park? (1 mile = 1,760 yards)
A. 1.96
B. 3.83
C. 3,444.39
D. 6,740,8
B. 3.83
A data set of 27 different numbers has a mean of 33 and a median of 33. A new data set is created by adding 7 to each number in the original data set that is greater than the median and subtracting 7 from each number in the original data set that is less than the media. Which of the following measures does NOT have the same value in both the original and new data sets?
A. Median
B. Mean
C. Sum of the numbers
D. Standard deviation
D. standard deviation