Asubmarine travels through the water at an elevation of - 203 meters (it travels below the surface). the sub starts to rise. the elevation changes by 4.3 meters per minute for the first 15 minutes. the sub continues to rise at 5.2 meters per minute for the next 12 minutes. what is the elevation of the submarine after it has been rising for 27 minutes? assume that sea level is at an elevation of 0 feet.

Well see here that it practically gives us the answer. The submarine rises 4.3 meter each minute of the first 15 minutes. Multiplying these two given numbers you get 64.5  . Great we're halfway through. Now onto the second equation. 5.2 times 12 . easy right? The answer round to 62.4 . Now all that's left to do is add the two together. After the 27 minutes the submarine should be at an elevation of 126.9 feet. rounding to 127 if you teacher requires you to round the numbers. 

The answer is part a: use

a - base

b - exponent

so,

the base is 8the exponent is 3the exponent tells you to multiply 8 together three timesthe expanded form is 8*8*8