A large rectangle is made by joining three identical small rectangles as shown. The perimeter of one small rectangle is 21 cm.
The width of one small rectangle is x cm.
x cm
Work out the perimeter of the large rectangle.
The final line of your answer should be of the form,
Perimeter of large rectangle is ... cm
Total marks: 4

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

it would take 5 hours i think idk i'm not that good at math.can you me with my questions i need asap.

- (2, -7)

- lines r and s and lines t and u must be parallel

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours