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3 years ago

5

The area of circle can be expressed by the formula A = πr2where r is a radius of circle. express radius in terms of area of circ

le.

1 answer:

leonid [27]3 years ago

7 0

Answer:

r=(A/π)^1/2

Step-by-step explanation:

A=πr^2. When dividing π on both sides, you get r^2 = A/π. Meaning that r = the square root of A/π, or (A/π)^1/2

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13 is the square root of what number

Firlakuza [10]

Answer:

169

Step-by-step explanation:

Square root means what number times its self is a different number. In this case, 13 times 13 = 169 so 13 times itself is 169.

3 0

3 years ago

Students have organized

Olenka [21]

Answer:

Part A. At least 6 hours

Part B. In less than 2.5 hours Elijah will be behind Mercedes

Part C. In more than 2.5 hours Elijah will be ahead Aubrey

Step-by-step explanation:

D = distance

v =speed

t = time

Formula connecting D, v and t:

$D=v\cdot t$

Part A.

Steve's speed: $v=3.5\ mph$

Distance: at least 21 miles

Time: unknown, so

$3.5\cdot t\ge 21\\ \\35t\ge 210\ [\text{Multiplied by 10}]\\ \\t\ge \dfrac{210}{35}\\ \\t\ge \dfrac{30}{5}\\ \\t\ge 6$

It would take Steve at least 6 hours to walk at least 21 mi on Day 1.

Part B.

Mercedes's speed: $v_M=2.4\ mph$

Elijan's speed: $v_E=3.2\ mph$

Elijan's Distance walked: $D_E$ miles

Mercedes's Distance walked: $D_M$ miles

Time: x hours

Mercedes is 2 miles ahead, so

$D_E=3.2x\\ \\D_M=2.4x+2$

Elijan will be behind when

$D_E$

In 2.5 hours Elijan will catch up Mercedes, and in less than 2.5 hours Elijah will be behind Mercedes.

Part C.

Aubrey's speed: $v_M=3\ mph$

Elijan's speed: $v_E=3.2\ mph$

Elijan's Distance walked: $D_E$ miles

Aubrey's Distance walked: $D_A$ miles

Time: x hours

At the beginning of Day 3, Elijah starts walking at the marker for Mile 42, and Aubrey starts walking at the marker for Mile 42.5.

$D_E=42+3.2x\\ \\D_A=42.5+3x$

Elijan will be ahead of Aubrey when

$D_E>D_A\\ \\42+3.2x> 42.5+3x\\ \\3.2x-3x>42.5-42\\ \\0.2x>0.5\\ \\2x>5\ [\text{Multiplied by 10}]\\ \\x>\dfrac{5}{2}\\ \\x>2.5\ hours$

In 2.5 hours Elijan will catch up Aubrey, and in more than 2.5 hours Elijah will be ahead Aubrey.

4 0

4 years ago

Is 2 pounds of meat will serve 5 people, how many pounds will be needed to serve 13 people?

Rina8888 [55]

Answer:

6 pounds

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

1. Use the graph to make a linear model of each function. Write a system of equations and state what the solution represents.

Vesnalui [34]

Answer:

ok so 300 square feet so draw a line there

Step-by-step explanation:

sorry if im not crocect

7 0

3 years ago

2 cos theta sin theta = cos theta

Lelu [443]

Step-by-step explanation:

2sin theta=1

Theya=30 degrees

5 0

3 years ago