Think of the square as a rhombus:

so 112.5 square inches
you can ask if it wasn't clear enough, I will explain.
Have a nice day!!!!
Answer:
6
Step-by-step explanation:
Altitude = 3400t +600
21,000 = 3400t +600
21000-600= 3400t
20400/3400 = 3400t/3400
t= 6
Answered by Gauthmath
Answer:
81
Step-by-step explanation:
(9x - 4)(9x + 4) = ax² - b
81x² - 36x + 36x - 16
= 81x² - 16
=> a = 81
The mean is the average of the two numbers. It can be calculated by adding the two numbers then dividing the answer by 2.
Therefore:
mean = (987+982) / 2 = 984.5
If he is getting 3 percent more per year then he will have 15450