Daily Math Practice Challenge: Preparing for the ACT Exam-DAY 20

6. The volume of a solid object is equal to the volume of water it displaces when completely submerged in water. A solid object will be placed in a rectangular tank that has a base of 40 in by 30 in and is filled with water to a uniform depth of 10 in. When the object is completely submerged, the new depth of the water in the tank is ​\( 10\frac{1}{2} \)​ in. What is the volume, in cubic inches, of the object?

F. 120
G. 600
H. 1,095
J. 1,260
K. 2,400

Correct Answer:G

7. In the standard (x,y) coordinate plane below, one of the following absolute value functions is graphed. Which one?

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A. f(x) = −⎪x − 3⎪ + 2
B. f(x) = −⎪x + 3⎪ + 2
C. f(x) = −⎪x − 3⎪ − 2
D. f(x) = ⎪x + 3⎪ + 2
E. f(x) = ⎪x − 3⎪ + 2

Correct Answer:B

8. Twenty households in a community were surveyed to determine how many bicycles they owned. The results were recorded and listed below. No household had 6 or more bicycles.

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Based on the data in the table, what is the expected value of the number of bicycles from a household in this community, rounded to the nearest tenth of a bicycle?

F. 1.0
G. 2.0
H. 2.5
J. 2.8
K. 3.5

Correct Answer:J

9. In ΔABC shown below, the lengths of the sides and an altitude are given in meters. Which of the following expressions gives the area, in square meters, of ΔABC ?

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Correct Answer:E

10. Anna will save $5 in Week 1, $6 in Week 2, and $7 in Week 3, saving $1 more each subsequent week until she saves $20 in Week 16. She will then start over, saving $5 in Week 17, then $6 in Week 18, saving $1 more each subsequent week, until she saves $20 in Week 32. This pattern will continue for all 52 weeks of the year. What is the total amount of money Anna will save in 1 full year?

F. $345
G. $468
H. $510
J. $520
K. $626

Correct Answer:K

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