A discount voucher offering 15% off is used to pay a bill.
2 answers:
Answer:
£43.20
Step-by-step explanation:
A discount voucher offering 15% off is used to pay a bill.
Let the original bill be x
After using the voucher of 15% off, the bill is reduced to £36.72
100 - 15 = 85
85% of the bill = £36.72
0.85x = £36.72
x =
x = 43.20
The bill was £43.20 before applying the voucher discount.
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Answer
given,
work = 5 J
spring stretch form 30 cm to 39 cm
x = 0.39 - 0.30 = 0.09 m
k = 1234.568 N/m
a) work when spring is stretched from 32 cm to 34 cm
x₂= 0.34 -0.30 = 0.04 m
x₁ = 0.32 - 0.30 = 0.02
W = 0.741 J
b) F = k x
25 = 1234.568 × x
x = 0.0205 m
x = 2.05 cm