2 years ago

M is directly proportional to r squared

Mathematics

1 answer:

Nesterboy [21]2 years ago

5 0

Answer:

m=84

r:m = 1:7

therefore when r= 1 then M=14

$r = 12 \\ m = 7 \times 12 \\ m = 84$

I think that's how you do it

You might be interested in

Identify tan P as a fraction and as a decimal rounded to the nearest hundredth. HELP PLEASE!!

irakobra [83]

$tangent=\dfrac{opposite}{adjacent}$

We have:

$opposite=8.5\\adjacent=16$

Substitute:

$\large\boxed{\tan P=\dfrac{8.5}{16}\approx0.53}$

8 0

3 years ago

The post office will accept packages whose combined length and girth is at most 42 inches. (the girth is the perimeter/distance

Vilka [71]

If x represents the length of the box, then 42-x will be the girth. Since the largest area for a given girth is that of a square, the side length of the square cross section is (42 -x)/4.

The volume as a function of package length is then
.. v(x) = x((42-x)/4)^2
This has a maximum at x=14. The corresponding volume is 686 in^3.

8 0

3 years ago

A boy has twice as many nickels as he has pennies, and he has 5 less dimes than nickels. If he has $4.46 in all, how many coins

Zarrin [17]

N=2p
n/2=p

n-5=d

10d+5n+1p=446
subsitute n/2 for p
subsitute n-5 for d
10(n-5)+5n+n/2=446
times 2 both sides
20(n-5)+10n+n=892
expand
20n-100+10n+n=892
31n-100=892
add 100 both sides
31n=992
divide both sides by 31
n=32

subsitute back

n/2=p
32/2=16=p

n-5=d
32-5=d=27

27 dimes
16 pennies
32 nickles

7 0

2 years ago

there are 36 people in the newtown hiking club. 2/3 of the club must vote yes if the club is to hike the northern trail. 20 peop

ivolga24 [154]

36/3=12
12*2=24
24-20=4
4 more votes are needed

3 0

3 years ago

The corner convenience store sells candy bars at 4 for $2.91. At the price, how much would the store charge for 3 candy bars?

den301095 [7]

Answer:

$2.1825 or simplified is $2.18.

Step-by-step explanation:

0.7275 per candy bars.

0.7275 x 4 = $2.91.

So according to that logic,

0.7275 x 3 = $2.1825.

6 0

2 years ago