80% of 90 may be found by multiply 90 by 0.8. Once you have that number, you can use it to set up a proportion with 2/5 (the simplified form of 40/100). Thus, you will write out 72/x = 2/5, since x is the number that you're solving for. Multiply numerators and denominators of opposite fractions to get the equation 72(5) = 2x. Finally, simplify 360 = 2x by dividing both sides by 2 to isolate the variable. You should have your answer by now.
Answer: 2%, second option is correct.
Step-by-step explanation:
To state 1/50 in percent, divide 1 by 50, then multiply by 100
=( 1 ÷ 50) x 100
= 0.02 x 100
= 2%
I hope this helps, please mark as brainliest.
Answer:
0.13%
Step-by-step explanation:
Mean, u = 17.4%
standard deviation, sd = 27.5%
We are looking for the probability that the money will double in value. Therefore we are looking for the value of x = 100% (meaning the value is 100% more that the previous year)
Find the value of z-score
z = (x-u)/sd
= (100 - 17.4) / 27.5 = 3.003
Find the z score using the z-table
From z-table at P(z<3.003) = 0.9987
So, for the probability that it the money will be double is
P (Z>2.8982) = 1 - P(z<2.8982)
= 1- 0.9987
= 0.0013 = 0.13%
They were up 15+0+25+10-20-10=20. The sum was 20 :)
Answer:
6.00
Step-by-step explanation:
