DO NOW: 5/14A & 5/15B Part#2 Check/Fix these & Explain Why For each of the following, check the work and the answer. Write either “it is
correct as is”, or show the correct work and answer. If the answer is wrong, explain why it is wrong in detail.<< a) -42 = 16 MOST of you said this was right The correct answer is -16 You won’t do

well on SATs or Freshman college math/placement test if you make this careless mistake! REMEMBER PEMDAS
TURN THIS IN TODAY: -52 = (-7)2 =
b) If r=0.5 and t=2, er t = 3.29744 You must do the EXPONENT(s)
FIRST (PEMDAS) TURN THIS IN TODAY: If r=2 and t=3, er t =
c) SQRT(-25) = -5 MOST of you didn’t answer this correctly either NEITHER -5 x -5 nor +5 x +5 equals -25 If you remember imaginary numbers, the answers are +/- 5i
TURN THIS IN TODAY: SQRT(-81)= (please don’t email me that can’t do this LOOK at the example
above ! !!!)
d) CubeRoot(-8) = imaginary (no real number) MANY of you did this wrong too. The question is asking WHAT THREE (identical) numbers multiplied together gives you -8 (“cube root”). ITISJUST-2 since -2x-2x -2=-8,sotheansweris-2!!!(aREAL number)
TURN THIS IN TODAY: CubeRoot(-27)=