Which situation is best modeled with a division expression?
2 answers:
Answer:
1. a.Finding the number of equal- sized parts into which a number can be split
2.b. She replaced both the divisor and the dividened with their reciprocals when changing division to multiplication in step 2.
Step-by-step explanation:
1.
a.Finding the number of equal- sized parts into which a number can be split
It is a division expression because when we find the total number of equal sized number then we divide the number which is split by the number in which a number split.Hence, it is true.
b.Finding the combined value of several numbers
It is obtained by simply adding of several numbers . Therefore, it is not a expression. Hence, it is false.
c. Finding the distance between two numbers on a number line
It is obtained by simply by adding or subtracting of two numbers . Therefore, it is not a division expression. Hence, it is false.
d. Finding the total value when several of the same number are grouped together
It is obtained by simply adding of same number which are grouped together.Therefore, it is not a division expression. Hence, it is false.
2.Joylin' work to solve a math problem
Manny walked of the distance to the library in
of an hour
Manny walks at a constant rate it means the speed remain same
Constant rate=
h=
h=
Hence, Joylin makes mistake in second step.
2.b. She replaced both the divisor and the dividened with their reciprocals when changing division to multiplication in step 2.
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Answer:
29.7345 square units
Step-by-step explanation:
Area of the shaded part = Area of the rectangle - Area of the quarter circle
Area of the rectangle = Length × Width = 10 × 8 = 80 square units
Area of the quarter circle = × π × r² (r for radius) = 0.25 × π × 8² = 50.2655 square units (answer rounded up to four decimal places)
Area of the shaded part = 80 square units - 50.2655 square units = 29.7345 square units