What is the length of the diagonal of the rectangle

19.2

Step-by-step explanation:

Okay, so if we slice this rectangle in half along the diagonal, we see that we can use the Pythagorean Theorem, a^2+b^2=c^2 to find the length of the diagonal. 12^2+15^2=369. The square root of 396 is 19.20937... rounded to the tenths is 19.2.

21/58.

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9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour