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2 years ago

What is 8 × 3/4 hour?

Mathematics

2 answers:

Lesechka [4]2 years ago

3 0

Answer:

6 hours

Step-by-step explanation:

8 × 3/4 hours

= (8 x 3) / 4

= 24/4

= 6 hours

Veronika [31]2 years ago

3 0

Answer:

Step-by-step explanation:

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How do I work this out??please help

serg [7]

The answer is x=5 because 24-3-5=16 so you have to get those 2 sides to equal 16....2*5=10+1=11 then add 5 and you get 16

4 0

3 years ago

Read 2 more answers

Evaluate the following integral using trigonometric substitution.

wariber [46]

Answer:

Step-by-step explanation:

1. Given the integral function $\int\limits {\sqrt{a^{2} -x^{2} } } \, dx$ , using trigonometric substitution, the substitution that will be most helpful in this case is substituting x as $asin \theta$ i.e $x = a sin\theta$ .

All integrals in the form $\int\limits {\sqrt{a^{2} -x^{2} } } \, dx$ are always evaluated using the substitute given where 'a' is any constant.

From the given integral, $\int\limits {7\sqrt{49-x^{2} } } \, dx = \int\limits {7\sqrt{7^{2} -x^{2} } } \, dx$ where a = 7 in this case.

The substitute will therefore be $x = 7 sin\theta$

2.) Given $x = 7 sin\theta$

$\frac{dx}{d \theta} = 7cos \theta$

cross multiplying

$dx = 7cos\theta d\theta$

3.) Rewriting the given integral using the substiution will result into;

$\int\limits {7\sqrt{49-x^{2} } } \, dx \\= \int\limits {7\sqrt{7^{2} -x^{2} } } \, dx\\= \int\limits {7\sqrt{7^{2} -(7sin\theta)^{2} } } \, dx\\= \int\limits {7\sqrt{7^{2} -49sin^{2}\theta } } \, dx\\= \int\limits {7\sqrt{49(1-sin^{2}\theta)} } } \, dx\\= \int\limits {7\sqrt{49(cos^{2}\theta)} } } \, dx\\since\ dx = 7cos\theta d\theta\\= \int\limits {7\sqrt{49(cos^{2}\theta)} } } \, 7cos\theta d\theta\\= \int\limits {7\{7(cos\theta)} }}} \, 7cos\theta d\theta\\$

$= \int\limits343 cos^{2} \theta \, d\theta$

8 0

3 years ago

A parallelogram has an area of 81 m² and a base of 9 m. What is the height of the parallelogram?

garri49 [273]

Answer:

9 m

Step-by-step explanation:

Let me just say WHY this is your answer before we solve it!

This is your answer because, if 9x9=81, then what else do you need. To find the area of something, you just need to <u>MULTIPLY!</u>

SO, to find the area of this, we just have to divide 81 by 9, and the answer of that is the answer of YOUR awesome question!

81÷9=????

C'mon, ya know it!

YES! It's

It's...

SO, 9 is your answer.

<h2>The height of the parallelogram is 9 m.</h2>

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5 0

2 years ago

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A student figures that he has a 4141% chance of being let out of class late. If he leaves class late, there is a 3030% chance

andreev551 [17]

Answer:

12.3%

Step-by-step explanation:

In this case, despite being different events, they are dependent on each other, therefore the final probability would be the multiplication of both probabilities.

So let L be the probability of being late that is equal to 41% and let T be the probability that the train will leave you and is equal to 30%.

That is to say:

L = 41% = 0.41

T = 30% = 0.3

So:

P = L * T

P = 0.41 * 0.3 = 0.123

So it means that the final probability is 12.3%

5 0

3 years ago

A field is 630 feet long and 285 feet wide. what is the area of the field in square yards?

Vlada [557]

The answer is d because if you compare feet to yards 3 feet= 1 yard so divide 630 and 285 by 3 and then multiply them which ends up in 19,950. Your Welcome!

8 0

2 years ago

Read 2 more answers

What is 8 × 3/4 hour?​

What is 8 × 3/4 hour?