Number of rooms can be wired by electrician is approximately 3
<em><u>Solution:</u></em>
Given that electrician needs rolls of electrical wire to wire each room in a house
To find: number of rooms can he wire with rolls of wire
From given information,
Rolls of wire needed for 1 room =
Total rolls of wire =
<em><u>So number of rooms can be wired:</u></em>
Thus number of rooms can be wired is or approximately 3 rooms
Answer:
(in the attachments)
Step-by-step explanation:
(also in the attachments)
hope this helps :)
Answer:
The outering is 11 cm so let's see what the Area is. We use the formula Area of a circle:
A = πr² = πd2/4
If:
Radius, r = 11 cm
Then:
Diameter, d = 22 cm
Circumference, C = 69.115038378975 cm
Area, A = 380.13271108436 cm²
now all we need to do is subtracts the inner circle Area.
If:
Radius, r = 9 cm
Then:
Diameter, d = 18 cm
Circumference, C = 56.548667764616 cm
Area, A = 254.46900494077 cm²
Thus: 380.13271108436 cm² - 254.46900494077 cm² =
125.6637061436 cm²
Step-by-step explanation:
Answer:
39 athletes
Step-by-step explanation:
There is a total of 45 people on the bus. This INCLUDES the athletes (A), 2 coaches and 4 managers.
Therefore, we need to sum A, 2 and 4 and equal it to 45:
2 + 4 + A = 45 so we need to used equation d.
To calculate how many athletes are on the bus, find the value of A:
2 + 4 + A = 45
Subtract 2 from both sides: 4 + A = 43
Subtract 4 from both sides: A = 39