Answer:
Step-by-step explanation:
So add the numbers on each side together
20% off means it is selling for 80% of the original price ( 100% - 20% =80%)
Divide the sale price by 80% as a decimal:
380/0.80 = 475
The original price was $475
Justify:
Multiply the original price by 20% and subtract:
475 x 0.20 = 95
475-95 = $380 which is the sale price.
Answer:
see explanation
Step-by-step explanation:
The n th term of a geometric progression is
•
= a₁ 
where a₁ is the first term and r the common ratio
given a₄ = 24, then
a₁
= 24 → (1)
Given a₈ =
, then
a₁
=
→ (2)
Divide (2) by (1)
=
= 
Hence r =
= 
Substitute this value into (1)
a₁ × (
)³ = 24
a₁ ×
= 24, hence
a₁ = 24 × 27 = 648
Answer:
Step-by-step explanation:
First, convert the 4 mins into hours by dividing by 60;
4/60 =0.067
Add 0.067 to 75 hrs to get the total = 75+0.067 = 75.067
Therefore the total time Chris needs to make up for is 75.067 hrs
Total number of days Chris has = 25
Next,
IF in 25 days = he can cover 75.067hrs
then in 1 day he will cover = (1 * 75.067)/ 25
= 3.002
Therefore, Chris needs to do 3hrs each day to be able to complete the deadline