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svetlana [45]
3 years ago
13

A carpenter has several boards of equal length. He cuts 3/5 of each broads.After cutting the boards the carpenter notices that h

e has enough pieces left over to make up the same length as 4 of the original board. How many boards did the carpenter star with?
Mathematics
1 answer:
Bess [88]3 years ago
4 0

Answer:

10

Step-by-step explanation:

Length of boards are the same :

Let number of boards = x

Fraction cut from each board = 3/5

Total fraction cut = 3/5 * x

Fraction left = 1 - 3/5 = 2/5

Total fraction left = 2/5 * x

Total pieces left = 2/5 * x = 4 times length of original board

Note ; original fraction = 1

Hence,

2/5 * x = 4 * 1

2x / 5 = 4

2x = 4 * 5

2x = 20

x = 20 / 2

x = 10

Number of boards = 10

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zavuch27 [327]
8. $700 at 8% for 6 years.

it could mean 
1. compound interest
2. simple interest. 

1. Compound Interest

that means that each year it gives you 8% on that whatever new thing so
8 %= 0.08
Each year, it is multiplied by 1.08 since you add the original (1) to the 8% 0.08
so 6 years means
700 times 1.08^6=700 times 1.08 times 1.08 times 1.08 times 1.08 times 1.08 times
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2. Simple Interest
 
So just 8% of that 700 is added on 
find 8% of 700
8% of 700+0.08 times 700=0.56
6 years = 0.56 times 6 =3.36
add 3.36 + 700= 703.36

Answers are 
if compound interest = $1110.81
If Simple interest = 703.36
 
I hope this helped 

~Renee \(^_^)/

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