Answer:
Step-by-step explanation:
GIVEN: Daniel invests 
in a retirement account with a fixed annual interest rate of 
compounded 
times per year.
TO FIND: What will the account balance be after 
years
SOLUTION:
Amount invested by Daniel 
Annual interest rate 
Total amount generated by compound interest is 
Here Principle amount 
rate of interest 
number of times compounding done in a year 
total duration of time 
putting values we get
=
Hence the total balance after 
will be
(85 + 84 + 78 + x) / 4 = 86
(247 + x) / 4 = 86
247 + x = 86 * 4
247 + x = 344
x = 344 - 247
x = 97 <=== her score was 97
Answer:
Step-by-step explanation:
The total surface area of a cone is given by :
Put r = 2r and l = 2l in the above formula
Hence, the total surface area of the cone is 
.
4x-6= x+6
4x= x + 12
5x= 12
X= 12/5
X= 2.5
Answer:
2
Step-by-step explanation:
d.
16x-3= -48
5x-3= -15
-7x-3= 21
=-42
c.
20x4= 80
-8x4= -32
= 48
-7+3= -4
