Week #25 Reach for the Stars

8th grade Math

Reach for the StarsMonday

Keanna made a solid figure by stacking cubes. The solid figure is shown.

Which drawing best represents a front view of this solid figure?

A. B. C. D.

Reach for the StarsMonday

A certain bacterium measures approximately 0.000015 millimeter in length. How is this length expressed in scientific notation?A 1.5 × 10– 5 mmB 1.5 × 10– 4 mmC 0.15 × 105 mmD 15 × 104 mm

Reach for the StarsTuesday

The two legs of an isosceles right triangle are 5 inches. What is the perimeter of the triangle?

A. 7.1 in

B. 12 in

C. 15 in

D. 17.1 in

Reach for the StarsTuesday

Before the last game of the basketball season, Fernando had scored a total of 73 points. He scored 20 points in the last game, making his season average 15.5 points per game. To find the total number of games he played, first find the sum of 73 and 20 and then

A add the sum to 15.5B subtract 15.5 from 73C multiply the sum by 15.5D divide the sum by 15.5

Reach for the StarsWednesday

Chris bought 6 packages of gum for a total of $4.50. At this rate, which equation can he use to find c, the total cost of 11 packages of gum?

Reach for the StarsWednesday

Some dragonflies can eat as much as 60% of their own weight in a single meal. The equation f = 0.60w can be used to find f, the amount of food equivalent to 60% of w, the weight of the dragonfly. If a 120-pound tiger ate at this rate, how much food would it eat in a single meal?

A 72 lbB 80 lbC 48 lbD 60 lb

Reach for the StarsThursday

Tamera combined ½ gallon of cranberry juice, 1 quart of apple juice, 46 ounces of ginger ale, and 8 ounces of pineapple juice to make punch. How many 6-ounce servings did she make?A. 10

B. 19

C. 25

D. 30

Reach for the StarsThursday

A cardboard box is feet long, feet wide, and feet tall. What is the volume of the cardboard box?

A. C.

B. D.

5

1

3

2

4

1

3

30

1ft

3

60

7ft

3

60

1ft

3

3

1ft

Reach for the StarsFriday

Bailey helps his father with his lawn-mowing service. His father charges from $25.00 to $50.00 per lawn depending on the size of the lawn to be mowed. Last Saturday, Bailey and his father spent 6 ½ hours mowing 3 lawns. If Bailey’s father actually charged $25.00 for the smallest lawn and $50.00 for the largest lawn, about how much could Bailey’s father have charged for all 3 lawns?

A. $75B. $95C. $110D. $150

Reach for the StarsFriday

Zac is painting his living room. He plans to paint all four walls and the ceiling. The walls in the living room are 9 feet tall, and the rectangular room measures 25 feet wide and 26 feet long. The room has a door that is 7 feet tall and 3.5 feet wide and a window that is 3 feet by 3 feet. He will not paint the door and the window. How many square feet does Zac plan to paint?

A. 1,510 square feetB. 1,534.5 square feetC. 1,568 square feetD. 2,218 square feet