Number System Formative Assessment 2 - 4th Hour

1. A horse runs 50 meters per 8 seconds. Express the horse's speed as a unit rate.

6

6.25

6 meters

6.25 meters

6 meters per second

6.25 meters per second

The horse runs 50 meters in 8 seconds, so to express its speed as a unit rate, we divide the distance by the time. Therefore, the horse's speed is 6.25 meters per second.

Explanation

The horse runs 50 meters in 8 seconds, so to express its speed as a unit rate, we divide the distance by the time. Therefore, the horse's speed is 6.25 meters per second.

2.

_____ .6

<

>

=

The answer is ">" because it represents the greater than symbol. In mathematical notation, ">" is used to compare two numbers and determine if the left number is greater than the right number.

Explanation

The answer is ">" because it represents the greater than symbol. In mathematical notation, ">" is used to compare two numbers and determine if the left number is greater than the right number.

3.

____

>

=

Answer option 4

not-available-via-ai

Explanation

not-available-via-ai

4. In a group of 20 students, 6 are sixth graders, 2 are seventh graders, and 12 are eighth graders. Write the ratio of eighth graders to the total number of students in simplest terms.

The ratio of eighth graders to the total number of students can be found by dividing the number of eighth graders (12) by the total number of students (20). Simplifying this ratio gives us 3:5, which means that for every 3 eighth graders, there are 5 students in total. Another way to express this ratio is 3 to 5 or 3/5.

Explanation

The ratio of eighth graders to the total number of students can be found by dividing the number of eighth graders (12) by the total number of students (20). Simplifying this ratio gives us 3:5, which means that for every 3 eighth graders, there are 5 students in total. Another way to express this ratio is 3 to 5 or 3/5.

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8. Write 5100300000 in scientific notation.

5.1 x 10^9

Explanation

5.1 x 10^9

9. Where should parentheses be placed to make this statement true? 7 + 3 x 5 - 1 = 19

(7 + 3) x 5 - 1 = 19

7 + (3 x 5) - 1 = 19

7 + 3 x (5 - 1) = 19

(7 + 3) x (5 - 1) = 19

The equation does not need parentheses to be true.

The correct answer is (7 + 3) x (5 - 1) = 19. This is because according to the order of operations in mathematics, parentheses should be used to indicate which operations should be performed first. In this case, the expression inside the first set of parentheses, 7 + 3, should be calculated first. Then, the expression inside the second set of parentheses, 5 - 1, should be calculated. Finally, the multiplication and addition should be performed to get the final result of 19.

Explanation

The correct answer is (7 + 3) x (5 - 1) = 19. This is because according to the order of operations in mathematics, parentheses should be used to indicate which operations should be performed first. In this case, the expression inside the first set of parentheses, 7 + 3, should be calculated first. Then, the expression inside the second set of parentheses, 5 - 1, should be calculated. Finally, the multiplication and addition should be performed to get the final result of 19.

10. Evaluate

. Express your answer in standard form.

The given question asks to evaluate the number and express the answer in standard form. The numbers .001846 and 0.001846 are already in standard form, as they are written in decimal notation without any trailing zeros. Therefore, the answer is simply the same as the given numbers, .001846 and 0.001846.

Explanation

The given question asks to evaluate the number and express the answer in standard form. The numbers .001846 and 0.001846 are already in standard form, as they are written in decimal notation without any trailing zeros. Therefore, the answer is simply the same as the given numbers, .001846 and 0.001846.

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