Electricity Bill Charges First 200 units 22p per unit
Remaining units 15p per unit
Mr Powers checks his electricity bill.
Here are his meter readings.
New reading:
Old reading
6538 units
6245 units
a)
Use subtraction to calculate the number of units used.
b)
Calculate the cost of the number of units used.

a) 293 units

b) £57.95

Step-by-step explanation:

a)

New reading:  6538 units

Old reading : 6245 units

The amount use is the difference between the two readings.

6538 - 6245 = 293

293 units

b)

293 is the same as 200 units plus another 93 units.

The first 200 units are charged at 22p per unit

Cost of the first 200 units: 200 units * 22p/unit = 4400p

Remaining units are charged at 15p per unit

Cost of the additional 93 units: 93 units * 15p/unit = 1395p

Total charge: 4400p + 1395p = 5795p = £57.95

£57.95

i think it would be 42cm

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.