Using BEDMAS
a) 6+4(2+3)^2
6+4(5)^2 - Eliminate addition in bracket
6+4(25) - Execute the exponent
6+100 - Mulitplying
106 - Addition
b)(6+4)(2+3)
(10)(5) -Addition in BRACKETS done
50 - Mulipication
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19/25=.76 or 76%
17/20=.85 or 85%, so, Keiko get a better grade on the second test
365........................
Answer:
diameter is 4
Step-by-step explanation:
