The formula for electrical power, P, is P = I²R, where I is current and R is resistance. The formula for I in terms of P and R is
2
(1) 1 =
(3) I = (P – R)2
(2) I=
P
R
(4) I = VP-R

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

umumumumum

im not sure

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24

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