So the formula for the area of a trapezium is
area = (a + b)/2 * h
*a is the short side
* b is the long side
*h is the height
so let's plug in the values we already know: area, long base, short base. Here's how the formula looks now...
6550 = (150 + 85)/2 * h
*so, we need to find 'h'
use algebra to find it.
6550 = (235/2) * h
6550 = 117.5 * h
6550/117.5 = h
h = 55.74 (approx)
Okay. I’m no mathematician, but I’m pretty sure it would be 995/90 = h. I used the “/” as the divide symbol. This would be the equation because you need to divide the total by the cash per hour to be able to get the number of hours the plumber worked. I really hope this helps!
The answer is 2.16 because 12.62 + 0.34 = 12.96 then 12.96 divided by 6 = 2.16 (please make me brainlyest)
It's saying that 95% of the time the comparison from test to retest is 96% reliable.
so I would take (0.95+0.96)÷2= 0.955
then 73×0.955=69.715
then 73-69.715=3.285
so I would range the possible true score between 69.715 and 76.285
also written as 73 ± 3.285
