Answer: He has earned $200 interest and the balance of his account is $1,200.
Step-by-step explanation:
Given: Principal : P = $1,000
Simple interest rate : r = 5% = 0.05
Time: t = 4 years
Simple interest = 

i.e. Simple interest = $200
Balance of account = Principal + Simple interest
= $1,000 + $200
= $1,200
Hence, he has earned $200 interest and the balance of his account is $1,200.
Answer:
is the correct answer to the given question .
Step-by-step explanation:
Equivalent expression are the same expressions although they can appear tiny bit differently.In the given question we have to express 10 + 10 + 10 in the multiplication form
Therefore

i. e=30
Which is same as

=30
so
3 * 10 is the correct answer
Answer:
80 pages
Step-by-step explanation:
3/4=60/80
Answer: 1.221
Step-by-step explanation: The decimal goes up by 2 places.