The answer is 7i because if you add 4+3i together as an absolute value, it equals to 7 plus the i is 7i
I think it would be 4.7A - C
Answer:
12 cm
Step-by-step explanation:
This would be the cubic root of 1728
= 12 cm
( 1729 is known as Ramanajan's number. Look it up - it's interesting)
Answer:
7 
Step-by-step explanation:
In order to solve an equation like this, you'll need to find a common denominator for your Fraction.
7 
+ 
7 
+ 
7
Answer:
77.88 minutes
Step-by-step explanation:
Given that :
Mean (m) = 70
Standard deviation (s) = 10
For 80% of student to complete the exam. In the given time
Using the formula :
Zscore = (X - mean) / standard deviation
80th percentile = 80/100 = 0.8 has a Zscore = 0.7881
0.7881 = (X - 70) /10
0.7881 * 10 = X - 70
7.881 = X - 70
7.881 + 70 = X
77.881 = X
Hence, 77.88 minutes should be given
