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3 years ago

A rectangular swimming

Mathematics

1 answer:

netineya [11]3 years ago

5 0

Answer:

Step-by-step explanation:

perimeter=150

lets name the length x

length=x

width=x-2

2[x±x-2]=150

2x±2x-4=150

4x=154

154÷4=77

x=77

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There are 25 students in Ms. Morris's class.She wants to divide the class into 3,4,or 5 equal teams.Which number of teams can sh

olga nikolaevna [1]

If there are 25 students and she wants either 3,4,5 equal teams you simply take and divide 25 by the numbers and determine if they are equal teams or not. So dividing 25 by 3 and getting 8.3 repeating isn't an equal team which means she cant have only 3 teams. Or you can divide 25 by 4 which will give you 5 students to a group which is an equal team set through out the room, also you can divide 25 by 5 which gives you 4 students to a group which also is an equal team set through out the room. Therefore the numbers of groups she can have are 4 and 5 but 3 is out of the question because it is a decimal also another thing about it is that it's an irrational number.

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4 years ago

The second on a watch is 14mm long. What area does it sweep through in 30 seconds

skad [1K]

Exact Area = 98pi

Approximate Area = 307.8760800518 (use calculator stored version of pi)

Approximate Area = 307.72 (using pi = 3.14)

Units are in square millimeters

======================================================

Explanation:

In 60 seconds, the hand sweeps out a full circle of radius 14. The area of this circle is

A = pi*r^2 = pi*14^2 = 196pi

Half of this is what the hand sweeps out in 30 seconds, so A/2 = (196pi)/2 = 98pi is the exact area it sweeps out. Your calculator would then show 98pi = 307.8760800518 approximately

If instead you use pi = 3.14, then the approximate area is 98*3.14 = 307.72

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3 years ago

2/5 are res, 1/5 are blue, 0.35 are white, and 1/20 are black. Order the shirt colors in oder from greatest to least

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Red, white, blue, black

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4 years ago

1.)If The simple interest on $1,000 for 2 years is $160, then what is the interest rate?

VARVARA [1.3K]

Answer:

Please see the detailed answer below:

Step-by-step explanation:

1.)

Interest Rate = Interest / (Principal x Time)

Interest Rate = $160 / ($1,000 x 2)

Interest Rate = $160 / $2,000

Interest Rate = 0.08

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2.)

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Interest = Interest Rate x Principal x time

Interest = 0.09 x $2,000 x 20

Interest = $3,600

Account Balance after 20 Years

Account Balance = Principal + Interest

Account Balance = $2,000 + $3,600

Account Balance = $5,600

Interest in 30 Years

Interest = Interest Rate x Principal x time

Interest = 0.09 x $2,000 x 30

Interest = $5,400

Account Balance after 30 Years

Account Balance = Principal + Interest

Account Balance = $2,000 + $5,400

Account Balance = $7,400

3.)

Interest = Interest Rate x Principal x time

Interest = 0.03 x $7,000 x 3

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Account Balance after 3 Years

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3 years ago

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gogolik [260]

Answer:

A the end of three years you would earned $48.96 in interest.

Step-by-step explanation:

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3 years ago