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Liono4ka [1.6K]

3 years ago

6

Jenna lives 4 3/10 miles from school. She estimates that she travels 4×2×5 or 40 miles each week. Is her estimate an overestimat

e or an underestimate?

2 answers:

Harman [31]3 years ago

7 0

It would be an over estimate the answer should be
4 3/10 x 7 = 30 1/10 or
4 3/10 x 5 = 20 1/2
hope this helps

patriot [66]3 years ago

5 0

It will be an underestimate the answer is 43 I hoped that helped?

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3 years ago

Please help ASAP! Thanks! For the figures below, assume they are made of semicircles, quarter circles and squares. For each shap

bazaltina [42]

Answer:

Part 1) $A=36(\pi-2)\ cm^2$

Part 2) $P=6(\pi+2\sqrt{2})\ cm$

Step-by-step explanation:

Part 1) Find the area

we know that

The area of the shape is equal to the area of a quarter of circle minus the area of an isosceles right triangle

so

$A=\frac{1}{4}\pi r^{2}-\frac{1}{2}(b)(h)$

we have that the base and the height of triangle is equal to the radius of the circle

$r=12\ cm\\b=12\ cm\\h=12\ cm$

substitute

$A=\frac{1}{4}\pi (12)^{2}-\frac{1}{2}(12)(12)$

$A=(36\pi-72)\ cm^2$

simplify

Factor 36

$A=36(\pi-2)\ cm^2$

Part 2) Find the perimeter

The perimeter of the figure is equal to the circumference of a quarter of circle plus the hypotenuse of the right triangle

<em>The circumference of a quarter of circle is equal to</em>

$C=\frac{1}{4}(2\pi r)=\frac{1}{2}\pi r$

substitute the given values

$C=\frac{1}{2}\pi (12)$

$C=6\pi\ cm$

The hypotenuse of right triangle is equal to (applying the Pythagorean Theorem)

$AC=\sqrt{12^2+12^2}$

$AC=\sqrt{288}\ cm$

simplify

$AC=12\sqrt{2}\ cm$

Find the perimeter

$P=(6\pi+12\sqrt{2})\ cm$

simplify

Factor 6

$P=6(\pi+2\sqrt{2})\ cm$

6 0

3 years ago

A storage box has a length of 9 in., a width of 6 in., and a height of 8 in. Which unit of measurement should be used to describ

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6 0

3 years ago

Read 2 more answers

Which best proves why the expressions 4(x+3)+2x and 6(x+2 must be equivalent expressions

ahrayia [7]

Answer:

6x + 12 = 6x + 12

Explanation:

4(x + 3) + 2x

4x + 12 + 2x Distribute 4.

6x + 12 Combine the like terms.

6(x + 2)

6x + 12 Distribute 6

5 0

3 years ago