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3 years ago

What is 48.5% of 300?

Mathematics

2 answers:

Dafna1 [17]3 years ago

8 0

Answer:

It's 145.5........

Anna11 [10]3 years ago

6 0

278 cause when you carry the three to the 48.5 you have a remainder equal to the composite of both

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Dale runs 4 miles in 30 min at the same rate, how many miles would he run in 48 min

ycow [4]

72 miles is how much he would run

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3 years ago

What is 4 divided by 154

tangare [24]

The answer is 38.5 Your welcome.

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4 years ago

Prove the formula for (d/dx)(cos−1(x)) by the same method as for (d/dx)(sin−1(x)). Let y = cos−1(x). Then cos(y) = and 0 ≤ y ≤ π

gtnhenbr [62]

Answer:

$\frac{d(cos^{-1}x )}{dx} = \frac{-1}{\sqrt{1-x^2} }$

Step-by-step explanation:

Given the differential (d/dx)(cos−1(x)), to find the equivalent formula we will differentiate the inverse function using chain rule as shown below;

let;

$y = cos^{-1} x \\\\taking \ cos\ of\ both\ sides\\\\cosy = cos(cos^{-1} x)\\\\cosy = x\\\\x = cosy\\\\\frac{dx}{dy} = -siny\\$

$\frac{dy}{dx} = \frac{-1}{sin y} \\\\from\ trigonometry\ identity,\ sin^{2} x+cos^{2}x = 1\\sinx = \sqrt{1-cos^{2} x}$

Therefore;

$\frac{dy}{dx} = \frac{-1}{\sqrt{1-cos^{2}y } }$

Since x = cos y from the above substitute;

$\frac{dy}{dx} = \frac{-1}{\sqrt{1-x^{2}} }$

Hence, $\frac{d(cos^{-1}x )}{dx} = \frac{-1}{\sqrt{1-x^2} }$ gives the required proof

5 0

4 years ago

Find the volume of the cone.

Murrr4er [49]

$\qquad\qquad\huge\underline{{\sf Answer}}♨$

Volume of cone :

$\qquad \sf \dashrightarrow \: \frac{1}{3} \pi{r}^{2} h$

Now, let's plug in the values as per the diagram ~

$\qquad \sf \dashrightarrow \: \frac{1}{3} \times 3.14 \times {(18)}^{2} \times 10$

$\qquad \sf \dashrightarrow \: \frac{1}{3} \times 31.4 \times 324$

$\qquad \sf \dashrightarrow \: 31.4 \times108$

$\qquad \sf \dashrightarrow \:3391.2 \: \: ft {}^{3}$

7 0

2 years ago

Help Me! I'm not good at this! I will mark brainliest!

Klio2033 [76]

Answer:

1.61 * 10 ^8

3.3 * 10^-7

Step-by-step explanation:

Multiply the numbers and then add the exponents

2.3 * 10^1 * 7 * 10^6

2.3 *7 * 10^(1+6)

16.1 * 10^7

We need to make this scientific notation by moving the decimal one place to the left and adding 1 to the exponent

1.61 * 10 ^8

Multiply the numbers and then add the exponents

1.1* 10^-5 3*10^-2

1.1 *3 * 10^(-5+-2)

3.3 * 10^-7

8 0

4 years ago

Read 2 more answers