It is correct only for the first one. The second one should be 3 to the power 2 times 2 times 5.
Both are correct.
90/2 = 45
45
90 ÷ 2 = 45
It is: 2 to the power 4 times 7 to the power 2 = 784
Both are correct.
(2 * 3)^2 *5=180 but 2*(3)^2 *5=90
The question was cut up a bit. Some possibilities: 90 minus 2 [ 90 - 2 = 88 ] 90 plus 2 [ 90 + 2 = 92 ] 90 times 2 [ 90 * 2 = 180 ] 90 divided-by 2 [ 90 / 2 = 45 ] 90 to-the-power-of 2 [ 90^2 = 8,100 ] 90 equals 2 [ No Solution ] Add on to the discussion to edit the question, if it wasn't answered.
45
You can you put 2 into 90 forty-five times.
90/2 = 45
2 x 90 = an insult to my intelligence
2 to the power of 2 times 2 to the power of -6 is 0.062
8100
90
45
15 times 6 = 90