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xxMikexx [17]
3 years ago
6

If a circle has a radius of 3.5 centimeters, what is its area?

Mathematics
1 answer:
sladkih [1.3K]3 years ago
5 0
Area=pi r^2
Pi 3.5^2
=38.465cm^2
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A dollar bill is about 15.5 cm long. If seventeen trillion dollar bills were laid end to end around the Earth's equator, how man
Mariana [72]

Answer:

The dollar bills would encircle earth 65753.1 times

Step-by-step explanation:

We have

Length of dollar bill = 15.5 cm

Total dollar bills = 17 trillion = 17\times 10^{12}

Thus the length of 17 trillion dollar bills equals

15.5\times 17\times 10^{12}cm\\\\=263.5\times 10^{12}cm\\\\=\frac{263.5\times 10^{12}}{10^{5}}km\\\\=263.5\times 10^{7}km

Now taking shape of earth as a perfect sphere the circumference of earth becomes

C=2\pi r\\\\=2\times \pi \times 6378km\\\\=40074.1558km

Thus the number of times the dollar bills would encircle earth equals

\frac{263.5\times 10^{7}km}{40074.1558km}=65753.21times

6 0
3 years ago
35 POINTS!<br><br> 0.75 divided by 0.3<br> 0.3 x 0.3 <br> 3/7 divided by 1/3
Sergio039 [100]
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3 0
3 years ago
Within 11 years, the age of Peter will be half the square of the age he was 13 years ago. Calculate the current age of Peter. Re
OLga [1]

Answer:

21

ctto JBarnum

Step-by-step explanation:

P+11=(1/2)(P-13)^2

P+11=(1/2)(P^2-26p+169)

2(P+11)=(1/2)(2)(P^2-26p+169)

2P+22=P^2-26p+169

0=P^2-28p+147      ( -7 and -21)

(P-7)(P-21)=0

P=7,21                     (cant be 7 as 13 years from 7 is negative so peter is 21)

checking:

21+11=32

32=(1/2)(21-13)^2

32=(1/2)(8)^2

32=(1/2)64

32=32

correct

4 0
3 years ago
HOW TO FIND A FRACTION OF THE ENGLISH ALPHABET IS A SET OF CONSENENTS
JulsSmile [24]

Answer:

21/26

Step-by-step explanation:

In the simplest categorization, English has 26 alphabets. Out of which, 5 are vowels and rest 21 are consonants.

so the fraction would be 21/26

4 0
2 years ago
Geoffrey's babysitter stayed from 5:15 P.M. until 11:35 P.M. For how much time
RUDIKE [14]

Answer:

6 Hours and 20 minutes

Step-by-step explanation:

3 0
3 years ago
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