Find the standard score for the given data value.A data value in the 88th percentile.
A. z = -1.4
B. z = 81.59
C. z = 1.2
D. z = -2.4
Answer: C
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Use an integer or rational number to express the number representing change.This year corn production increased 25,000 pounds from last year on Steve's farm.
A. 25,000 B. -25,000
The "forgetting curve" for memorizing nonsense syllables is given by equation below, where R is the percentage who remember the syllables after t seconds.
?
, 
?
In how many seconds would only 10% 
of the students remember? Round your answer to the nearest second.
?
Solve for the exact value of t in terms of R.
What will be an ideal response?
Solve the equation.x2 - 12x + 45 = 0
A. 12 ± 6i B. 9, 3 C. 6 ± 3i D. -6 ± 3i
Find the perimeter. Use 3.14 for ? when needed.
A. 167.316 km B. 72.67 km C. 136.815 km D. 56.185 km