2 years ago

100 students attended a revision lesson at the weekend.

Mathematics

1 answer:

solniwko [45]2 years ago

4 0

Answer:

I am pretty sure its 30 students

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You have two circles, one with radius r and the other with radius R. You wish for the difference in the areas of these two circl

gtnhenbr [62]

Answer:

maximum difference of radii = $(r-R)=\frac{1}{2\pi ^{2}}$

Step-by-step explanation:

We know that area of circle is given by

$A=\pi \times (radius)^{2}$

For circle with radius 'r' we have

$A_{1}=\pi \times (r)^{2}$

For circle with radius 'R' we have

$A_{2}=\pi \times (R)^{2}$

Now according to given condition we have

$A_{1}-A_{2}\leq \frac{5}{\pi }$

$\Rightarrow \pi r^{2}-\pi R^{2}\leq \frac{5}{\pi }\\\\\Rightarrow (r^{2}-R^{2})\leq \frac{5}{\pi ^{2}}\\\\(r+R)(r-R)\leq \frac{5}{\pi ^{2}}\\\\\because (a^{2}-b^{2})=(a+b)(a-b)\\\\(r+R)=10(Given)\\\\\Rightarrow(r-R)\leq \frac{5}{10\pi ^{2}}\\\\\therefore (r-R)\leq\frac{1}{2\pi ^{2}}$

Thus maximum difference of radii = $(r-R)=\frac{1}{2\pi ^{2}}$

6 0

2 years ago

Alina is able to swim at a rate of about 2.5 miles per hour. Talia is able to swim at a rate of 1.8 meters per second. Which sta

Inessa05 [86]

Answer: A/ alina swims about 0.7 miles per hour

Step-by-step explanation:

7 0

2 years ago

For 2, use the relationship between the values of the digits to solve Write a number in which the value of the 3 is ten times gr

larisa [96]

Answer:

New Digit = 315,864

Step-by-step explanation:

Given:

Digit - 135,864

Value of digit 3 = 30,000

Find:

New Digit, Value of 3 is 10 times greater

Computation:

Value of 3 is 10 times greater = (30,000) = 300,000

New Digit = 315,864

8 0

2 years ago

When Ashley left her house in the morning, her cell phone battery was partially charged. Let BB represent the charge remaining i

Ray Of Light [21]

Answer =

B= 50-10t

y-intercept of the function is 50 which represents the charge of the battery when Ashley left her house.

Step-by-step explanation:

4 0

1 year ago

An angle measuring (525n)° is in standard position. For which value of n will the terminal side fall along the negative portion

Mazyrski [523]

For n=2,

put the value 2 in the above equation we get 525*2=1050°.

1050° angle takes 2 complete revolution and then makes an angle of 330° which will fall in the negative portion of y-axis.

For n=6,

put the value 6 in the above equation we get 525*6=3150°.

3150° angle takes 8 complete revolution and then makes an angle of 270° which will fall along negative y-axis.

8 0

2 years ago

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