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3 years ago

2.21 is 2.5% of what

1 answer:

6 0

So first to solve this you divide it by 2.5 to get what 1% is: this would be 0.884.
Then to get 100% of the number you multiply 0.884 by 100. The answer to that is 88.4.
2.21 is 2.5% of 88.4, hope this helps!

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Hi guys can you please help me

marissa [1.9K]

Answer: 40

Step-by-step explanation:

Finding perimiter is simple! You add the L & the W by each other and then times that by 2!

15 + 5 = 20

20 X 2 = 40!

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2 years ago

2/3 x -9/8 x -4/5 x -1

jolli1 [7]

-151/120x -1 or 1\120 × (-151x -120)

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2 years ago

A science teacher ordered $1848 worth of microscopes and dissection kits for the new science lab. A total of 30 microscopes and

andrezito [222]

Answer:

Microscopes cost $44 and Dissection Kits cost $11

Step-by-step explanation:

Using the information given, we can make the system of equations:

30x+48y=1848

x represents the price of microscopes and y represents the price of dissection kits.

We also know that microscopes will be 4x the price of dissection kits. Therefor:

x=4y

We can plug these two equations together to find the answer.

30(4y)+48y=1848

120y+48y=1848

168y=1848

y=11

Using the y-value, can find the x-value.

x=4(11)

x=44

4 0

2 years ago

The perimeter of the semicircle is 25.71 cm. Calculate the value of radius x. Take pi to be 3.142

yan [13]

Answer:

5 cm

Step-by-step explanation:

$Perimeter of semicircle = \frac{1}{2} \times 2\pi \: x +2x\\ 25.71 = 3.14 2\times x+ 2x\\ 25.71 = 5.14 2 x\\ x = \frac{25.71}{5.142} \\ x = 5 \: cm$

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3 years ago

Which number completes the inequality? 2/3 < <7/9 3/5 6/9 3/4 6/7

Sati [7]

Answer:

3/4

Step-by-step explanation:

It can be helpful to use a common denominator for comparison. That denominator can be 100, meaning we can make them all decimal fractions. Approximate (2 digit) values are good enough for the purpose.

2/3 ≈ 0.67 . . . . left end of the range

7/9 ≈ 0.78 . . . . right end of the range

3/5 = 0.60

6/9 ≈ 0.67 . . . . = 2/3, so is not greater than 2/3

3/4 = 0.75

6/7 ≈ 0.86

The only decimal value between 0.67 and 0.78 is 0.75, corresponding to the fraction 3/4.

2/3 < 3/4 < 7/9

5 0

2 years ago

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