Please help and tell me how you got the answer. Will mark brainlist!

1. 540 cm^3

2. 448 cm^3

Step-by-step explanation:

1. Volume of rectangular prism is height times width times length, hwl, or

18*7.5*4 = 540, 540 cm^3

2. Volume of triangular prism is surface area of base times length

the length is 14 cm, and the base is the triangle, The area of a triangle is half of the base times the height, 1/2b * h. The base of this triangle is 8 cm, and the height is also 8 cm, 1/2(8) * 8 = 4*8 = 32, 32 times the length of the triangle is 32*14 = 448 cm^3

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

the answer is the third / last answer

step-by-step explanation: