Solve the formula for the specified variable.P = 
for r
A. r = P - tA
B. r = 
C. r = 
D. r = 
Answer: B
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Find an equation of variation for the given situation.y varies inversely as x and y = 0.5 when x = 0.7
A. y = 
B. y = 
C. y = 0.71x
D. y = 
Identify the function's local and absolute extreme values, if any, saying where they occur.h(x) = 
A. local minimum at x = -3; local maximum at x = 5 B. no local extrema C. local minimum at x = -3; no local maxima D. local minimum at x = -4; local maximum at x = 5
A solution has a hydrogen ion concentration of [H+] = 7.6 × 10^–8.
The pHH scale is defined as pH = –log[H+] where [H+] is the hydrogen ion concentration, in moles per liter. Substances with a pH less than 7 are acidic, and those with a pH greater than 7 are basic. Is the solution acidic or basic? A) Acidic B) Basic
Solve the problem.
?The circle represents a whole or 1. Determine the unknown fractional part of the circle. (Divisions in circle not to scale.)
A. 
B. 
C. 
D. 