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valina [46]
3 years ago
14

One fifth of r is 45

Mathematics
2 answers:
photoshop1234 [79]3 years ago
8 0
Is 9 because when you divide 5 into 45 you get 9
Annette [7]3 years ago
4 0
\frac{1}{5}r=45 \\  \\ r=45*5= 225


<span>Just multiply both sides by 5</span>
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Ali, Ben, and Cliff plant seedlings in their neighborhood park. Ali plants 40% of the total number of seedlings, Ben plants 45%
Juli2301 [7.4K]

Answer:

580 seedlings altogether.

Step-by-step explanation:

Given that,

Ali plants 40% of the total number of seedlings, Ben plants 45% of the total number of seedlings, and Cliff plants the rest of the seedlings. Cliff plants 87 seedlings.

The percentage of the seedling planted by Cliff = 100% - 45% - 40% = 15%

<em>Let x = the total number of seedlings</em>

<em />15\%\ of\ x=87\\\\x=\dfrac{87\times 100}{15}\\\\x=580

Hence, three boys plant 580 seedlings altogether.

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3 years ago
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Naddika [18.5K]

Answer:

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Step-by-step explanation:

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3 years ago
Use the calculator to find the product. (9. 1 × 109)(7. 5 × 102) What is the exponent of the power in scientific notation?.
____ [38]

The exponent of the power is 11 in scientific notation.

<h3>Given </h3>

The numbers are;

The product of  (9. 1 × 10^9)(7. 5 × 10^2)

<h3>What is scientific notation?</h3>

Scientific notation is a method of expressing numbers in terms of a decimal number between 1 and 10, but not 10 itself multiplied by a power of 10.

To find the product of the given numbers follows all the steps given below.

The product of number is;

=(9.1 \times  10^9) \times (7.5 \times 10^2)\\\\= (9.1 \times 7.5) \times (10^{(9+2)})\\\\ =68.25 \times 10^{11}

Hence, the exponent of the power is 11 in scientific notation.

To know more about Scientific notation click the link given below.

brainly.com/question/4964086

4 0
3 years ago
For brett's birthday his mother gave out colorful birthday hats that were cone shaped. the opening of the bottom of the hat was
nika2105 [10]
The volume of cone is calculated by the formula V= \frac{1}{3} \pi R^2H, where H is a height of cone and R is a radius of the bottom.
In your case, R=3 cm and R=7 cm. Then V= \frac{1}{3} \pi* 3^2*7= \frac{63\pi}{3} =21\pi.
Answer: The volume of candy is 21π.
4 0
3 years ago
In triangle ABC, A is a right angle and M B=45°. Find BC. If you answer is not an integer, leave it in simplest radical form.
Nataly_w [17]

Step-by-step explanation:

- In a right triangle, if ∠B is 45°, then ∠C is too.

-- Since ∠B  and  ∠C  are equal, the sides opposite them

are equal too.  This is an isosceles right triangle.  Its legs

are equal.

-- (The hypotenuse)²  =  (one leg)²  +  (the other leg)²

                                  =       (12-ft)²  +  (12-ft)²

                                  =              (144 x 2)

     The hypotenuse  =  √(144 x 2)  =  12√2 .

LOL

7 0
3 years ago
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