Question

Hailey, a chemistry student, is measuring samples of a metallic substance for an experiment on density, using a balance that measures to 1/10 of a gram. Which is the most accurate measurement based on the limitations of the balance that might be found in her recorded data?

Answer 1

It would be answer C, because the most accurate you can go on a scale of measurement is one decimal place lower than the given.

Answer 2

A student scored an 88, 92, and 76 on three math tests. What does the student need to get on the fourth test to have an average of 85 for all four tests?

James wants to use algebra to solve this problem. Which equation should he use?
A)
4x =
256
85
B)
256 + x
4
= 85

C)
85 + x
4
= 256
D)
256
3
=
85x
4

Answer 3

B

Answer 4

Mrs. Reed is decorating wreaths. She needs 24 in. of gold ribbon and 45 in. of white ribbon to tie around each wreath. The white ribbon is sold by the foot. About how many feet of white ribbon will Mrs. Reed need to make 18 wreaths?