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Irina18 [472]
3 years ago
8

What percent of 21 is 28?

Mathematics
2 answers:
Juli2301 [7.4K]3 years ago
7 0

Answer:

75%

Step-by-step explanation:

Sorry it took so long for me to see this

100%/x%=28/21

(100/x)*x=(28/21)*x       - we multiply both sides of the equation by x

100=1.333*x       - we divide both sides of the equation by (1.333) to get x

100/1.333=x

75=x

x=75

21 is 75% of 28

Good luck have a Nice Day

laiz [17]3 years ago
6 0

Answer:75

Step-by-step explanation:

21 divded by 28 times 100= 75

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Can someone help me? I know that t=20 I just don't know how to get there
Aneli [31]
2t/5=8t/20    (both numbers multiplied by 4)

t/4=5t/20    (both numbers multiplied by 5)

3=60/20

⇒ 8t/20 - 5t/20= 60/20

3t/20=60/20

⇒3t=60

t=60:3

t=20

I hope you understand !
7 0
4 years ago
(8.6x107)-(9.1x10-8)simplify
natima [27]

Answer:

  85,999,999.999 999 909

Step-by-step explanation:

The expression represents the difference of a relatively large number and one that is relatively small. That difference is approximately the value of the large number. The exact value requires 17 digits for its proper expression. Most calculators and spreadsheets cannot display this many digits.

<h3>Standard form</h3>

The numbers in standard form are ...

  86,000,000 = 8.6×10^7

  0.000000091 = 9.1×10^-8

<h3>Difference</h3>

Their difference is ...

  86,000,000 -0.000000091 = 85,999,999.999 999 909

In scientific notation, this is ...

  8.599 999 999 999 990 9×10^7

4 0
2 years ago
-2x+5=24 I need help!!!
butalik [34]

Answer:

x=-\frac{19}{2}

Step-by-step explanation:

hope that was the answer you were looking for :/

4 0
3 years ago
Read 2 more answers
Aaron invested $740 in an account paying an interest rate of 5%
vlada-n [284]

The amount of money   Justin would have in his account than Aaron, to the nearest dollar is $0

What is the future value formula for continuous compounding cash flow?

The future value, which is used to determine the worth of this investment of $740 made now in 18 years is as shown below:

FV=PV*e^(rt)

FV=the worth of the investment in 18 years=unknown

PV=the amount invested today=$740

e=mathematical exponential value=2.7182818

r=rate of interest which compounded continuously=5%

t=time of investment in years=18

FV=$740*2.7182818^(5%*18)

FV=$740*2.7182818^(0.90)

FV=$740*2.459603087981220

FV=$1,820.11

Justin:

FV=PV*(1+r/m)^(n*m)

PV=$740

r=5%

m=number of times in a year that interest is compounded=365

m=number of years=18

FV=$740*(1+5%/365)^(18*365)

FV=$1,819.99

difference=$1,820.11-$1,819.99

difference=$0.12($0 to the nearest dollar)

Find out more about continuous compounding on:brainly.com/question/23136156

#SPJ1

8 0
1 year ago
HELP PLS! ;P<br>Find n.<br><br>A. 5√3<br><br>B. 5<br><br>C. 10√3/3<br><br>D. 10
Readme [11.4K]

Answer:

B

Step-by-step explanation:

tan(30)=n/(5*sqrt(3))

=> n=5

4 0
3 years ago
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