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2 years ago

The area of a circle is 18.31cm2. find the length of the radius rounded to 2 dp.

Mathematics

1 answer:

drek231 [11]2 years ago

5 0

Answer:

Step-by-step explanation:

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How can I solve 5m-8=3m+8 for m?

sammy [17]

The work is down below. your answer is m=8.

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3 years ago

What is the value of x in the equation 1,331x with the exponent of 3 -216 =0

dimulka [17.4K]

The answer is x=6/11.
Tiger Algebra is a really good tool for algebra if you need some help.
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3 years ago

Without further study, you forget things as time passes. A model of human memory gives the percentage, p, of acquired knowledge

PIT_PIT [208]

Answer:

42.69% of information is acquired by the student in two weeks.

Step-by-step explanation:

We are given the following in the question:

$p = (100 -a)e^{-bt} + a$

where a and b are constants.

$a = 18\\b = 0.6$

p tells us about the percentage of acquired knowledge that a person retains after t weeks.

We have to find the percentage of knowledge acquired in two week.

We put t = 2

$p = (100 -18)e^{-(0.6)(2)} + 18\\p = 42.69$

Thus, 42.69% of information is acquired by the student in two weeks.

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3 years ago

Graph the inverse circular function by hand, given f(x) = 3sin(2x) ;-pi/4 ≤ ≤pi/4

nasty-shy [4]

Part a)

a) The given function is

$f(x) = 3 \sin(2x)$

We let

$y = 3 \sin(2x)$

Interchange x and y.

$x= 3 \sin(2y)$

Solve for y;

$\frac{x}{3} = \sin(2y)$

$y = \frac{1}{2} { \sin}^{ - 1}( \frac{x}{3} )$

${f}^{ - 1}(x) = \frac{1}{2} { \sin}^{ - 1}( \frac{x}{3} )$

Part b) The range of f(x) refers to y-values for which f(x) exists.

The range of f(x) is

$- 3 \leqslant y \leqslant 3$

This is because the function is within y=-3 and y=3.

c) The range of

${f}^{ - 1} (x)$

$- \frac{ \pi}{4} \leqslant y \leqslant \frac{\pi}{4}$

The domain is -3≤x≤3

This is because the domain and range of a function and its inverse swaps.

Part d) The graph is shown in the attachment.

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4 years ago

In which number is the digit 5 one hundred times larger than it is in the number 253?

Paraphin [41]

The answer is B.
I timesed 50 by 100 and 1,000. So 5 would be in the thousands place.

7 0

3 years ago

Read 2 more answers