Answer:
Part A: 0.85p
Part B: 0.901p
Step-by-step explanation:
The phone's original price: 100%
The phone's sale price: 15% off the original price
p = original price of the phone
Part A:
100% - 15% = 85%
85% = 0.85
The expression: 0.85p
Part B:
6% = 0.06
0.06 * 0.85p ==> (the sales tax * the discounted price of the phone)
0.051p
0.85p + 0.051p
0.901p
Hope this helps!
