CAASPP Testing 8th Grade Math Practice Scoring Guide Answers

A cone with the radius 6 feet and height 15 ft is shown. enter the volume.

1/3 x pie 6 x 15 =1/3 x pie 36 x 15, 36x15=540, 540/3=180, 180 x 3.14= 565.49

Enter the value of n for the equation 5^n = 5^11 x 5^3

14

Simone and Nang read a total of 23 books over the summer. Simone reads 5 more than Nang.

23-5= 18, 18/2=9 books.

David and Karen have a goal to read 10,000 pages together. David reads 80 pgs a day. Karen reads 25% more pgs per day than David. They agree that 180d=10,000 will tell them how many days it will take them to read 10,000 pgs. They invite rick to read, and he reads 35% fewer per day than Karen.

25/100 x 80=20, 80+20=100, 35/100 x 100=35, 80+100+65=245, so 245d=10,000

When the water has no chemicals, the number of bacteria is 1200 per gallon. for each tablespoon of the chemical solution added to each gallon of water, the number of bacteria decreases by 75 per gallon. how much of the chemical, in tablespoons, must be added to a 500 gallon tank to reduce bacteria count to 300 per gallon?

300=1200-75x, 900=75x, x=12, 12x500=6000.

Select all possible values for x in the equation x^3=375.

5 sqrt 3, 3 sqrt 375

Mary is buying tickets for a movie. each adult tickets cost $9. Each child ticket cost $5. Mary spens $110 on tickets. Mary buys a total 14.

90x10=90, 5x4=20, 90+10=110, 10 adult tickets, 4 child tickets

Marco says that the interior angles of a triangle add up to 180. he claims that the interior angles of a hexagon must add up to 360 because a hexagon has twice as many vertices as a triangle and can be divided into two triangles. therefor, its interior angles must sum to twice the values of the triangles. what is his mistake?

A hexagon can be divided into 4 triangles, not 2.

Select True or False to indicate whether each comparison is true. 1. sqrt 37 < 5 1/4 | true | false | 2. 3 pie > 3 sqrt 3 | true | false | 3. sqrt 5 > 5/7 | true | false | 4. 15/sqrt10 < 8.38 | true | false

F, T, T, F

Determine for each number whether it is a rational or irrational number. 1/sqrt 9 | rational | irrational | sqrt 17 | rational | irrational -1 2/3 | rational | irrational | 0.423 | rational | irrational |

R, I, R, R

Step 1: j^2(k^6/k^7)^3 step 2: j^2(k^-1)^-3 step 3: j^2k^-4 martha made a mistake. which step was it, and whats the correct response?

Step 3; j^2j^3

Jamal states that ax+b=a(x+c) given a, b, and c are not equal to 0. what must be the value for c for it to be true?

b/a

The ratios a;b and b;c are equivalent to one another.

b/a=c/b, if a=b, then b=c

A cross section of a ramp is shown. The length of the base is 45 inches and the height of the ramp is 28 inches. enter the length, x, in inches.

c= 28^2 + 45^2, which is then 784+2025= 2809, then square root of 2809 is 53.

A cylinder with radius 3 ft and height 5 feet is shown.

v=pie (3)^2 (5), (9), (5), 9x5=45, 45xx3.14= 141.30

Select all equations that can form a straight line.

x=16+3y 8x-5y=30, y=6(x+10)

consider the line shown on the graph. Enter the equation of the line in the form of y =mx where m is the slope.

y = 1/2x, or y=0.5x