Select the more reasonable temperature for the item.Room temperature20°C20°F
A. 20°C
B. 20°F
Answer: A
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Find the additive inverse or opposite.-23
A. 0 B. -1 C. 23 D. -23
The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.Lower levels of pH indicate a more acidic solution. If the pH of solution A is 4.2 and the pH of solution B is 6.9, how much more acidic is solution A than solution B?
A. 0.0000630 times as acidic B. 501.2 times as acidic C. 0.00200 times as acidic D. -0.0000630 times as acidic
Indicate whether the equation illustrates the multiplication property of 0, the multiplicative identity, the commutative property of multiplication, or the associative property of multiplication.
? 1 = - 
A. Multiplication property of zero B. Multiplicative identity C. Commutative property of multiplication D. Associative property of multiplication
Solve.x2 + 4x - 32 = 0
A. x = -8, x = 4 B. x = 4, x = 8 C. x = -4, x = 8 D. x = -8, x = -4