2 consecutive numbers....x and x + 1
x + x + 1 = 73
2x + 1 = 73
2x = 73 - 1
2x = 72
x = 72/2
x = 36
x + 1 = 36 + 1 = 37
so ur numbers are 36 and 37 <==
Frequency describes the number of waves that pass a fixed place in a given amount of time.
By the picture it looks like they keep multiplying it by 3 so you just do 90*3 =270 and 270*3=810 so your next to answers should be 270 and 810
(4/9)/16 = 4/(9*16) = 4/(4*4*9) = 1/(4*9) = 1/36
One counter is

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Total cost of croissants produced = $1.75 x 300 = $525
Total expected revenue = (100 + 45%)/100 x $525 = 1.45 x 525 = $761.25
Number of croissants expected to spoint = 0.10 x 300 = 30 croissants.
Number of croissants sold = 300 - 30 = 270 croisants.
Unit price of each croissant = $761.25/270 = $2.82
Therefore, each croissant should sell for $2.82