Answer:
Step-by-step explanation:
First multiply the 5.38 and 4.2 together to get 22.596. We will deal with it in a bit. For the bases of 10, we will add the exponents giving us 10 to the 7th power. So this is what we have so far:

. But that decimal number has to be between 1 and 10 and it's too high so we have to move the decimal one more place to the left. When we do that, we are adding one more power to the 10. The final answer in scientific notation is
Answer:
42 inch
Step-by-step explanation:
Since the trapezoid can be inscribed in a circle, that means angle B + angle D = 180 degree. Since AB is parallel to CD, then angle B + angle C = 180 degree. Therefore, angle D = angle C.
It is 140 degrees. You set the two equations equal to each other and you solve for x. After that, you can plug it into the first equation and get the answer. In this case, X is equal to 4.