You know
Squaring both sides gives
Then raising both sides to any integer power 
gives
That is, any power of 
where the power is a multiple of 4 will always be equal to 1.
So
But perhaps you mean to write 20+1 as the exponent, in which case
Answer:
7.716 x 10^-3
Step-by-step explanation:
Using indicies,
0.3858 x 0.02
(3.858 x 10^-1) x (2.0 x 10^-2)
3.858 x 2.0 x (10^-1 + -2)
7.716 x 10^-3
The line in the middle has a right angle, so the angle just above the Y would be 90 degrees.
The angle to the right of y is given as 48.
The three inside angles of a triangle need to equal 180.
So y = 180 - 90 - 48 = 42 degrees.
Answer:
Step-by-step explanation:
Ted had 5 apples weighing 7¼
7¼×5=?
29/4×5=116/4
116/4=29 ounces
Robin had 6 apples weighing 6½
6½×6=?
13/2×6=78/2
78/2=39 ounces
Difference = 39-29=10 ounces
