1. What's the total value of 25quarters,35dimes,20nickels and 10 pennies?

1 Answer
Hihi
Feb 23, 2018
  1. $10.85
  2. 344.4 or 346.9
  3. #4321/3#

Explanation:

1.
Quarters refer to $0.25
Dimes refer to $0.10
Nickels refer to $0.05
Pennies refer to $0.01

Total value
#=$(25*0.25+35*0.10+20*0.05+10*0.01)#
#=$10.85#

2.
There are two formula for interest, with simple interest, where interest is based on the number of years multiplied by the rate, and the compound interest, where the interest is based on the compounded amount for a certain time. Suppose the interest is compounded annually.

Simple interest:
#A=P*(1+r*y)#
#A=300*(1+3.7%*4)#
#A=344.4#

Compound interest
#A=P*(1+r)^y#
#A=300*(1+3.7%)^4#
#A approx 346.9# (corr. to nearest 1 decimal place)

3.
#864.2÷0.6#
#=864.2/0.6#
#=(8642*0.1)/(6*0.1)#
#=8642/6#
#=4321/3#
#(=1440.dot3)#

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