As a person cycling increases speed, the rate of calories burned, distance traveled, and energy expended also increase. Which of the following is the independent variable?
A. Energy
B. Calories
C. Speed
D. Distance
an independent variable is one that when changed, causes the other variable(s) to change. In our case, calories burned, distance traveled, energy used increase when cycling speed increases.
Therefore, speed is the independent variable while other variables are dependent.
Therefore, the Correct Answer is C.
More Questions on TEAS 7 Math
-
Q #1: Which of the following values is the greatest?
A. 9/2
B. 4.4
C. 10/3
D. 4.25
Answer Explanation
The initial step is to convert the decimal numbers into fractions.
4.4 becomes 44/10
4.25 becomes 425/100
Thus, the set of fractions is 9/2, 44/10, 10/3, 425/100. The least common denominator for 2, 10, 3, and 100 is 300, which we use to compare each options given.
9/2*300=1350
44/10*300=1320
10/3*300=1000
425/100*300=1275
From the above, 1350 is the greatest value which corresponds to 9/2. Thus, 9/2 is the greatest value of all the choices given.
-
Q #2: A recipe calls for 2.5 teaspoons of vanilla. 1 teaspoon equals approximately 4.93 mL. Which of the following is the correct amount of vanilla in mL?
A. 5.33 mL
B. 12.325 mL
C. 7.43 mL
D. 0.507 mL
Answer Explanation
We need to find how many mL are in 2.5 teaspoons. We need to use dimensional analysis to solve this problem as follows.
Converting between teaspoon and mL uses the following conversions:
Or
We want to end up with mL, we utilize the second conversion and set up the following equation.
Thus, 2.5 teaspoons can hold 12.325 mL.
-
Q #3: Which of the following is the correct decimal placement for the product of 1.3 * 0.47?
A. 6.11
B. 0.611
C. 0.0611
D. 0.00611
Answer Explanation
in the given problem, we use the calculator to find 1.3*0.47=0.611
