The temperature in a laboratory must be between 70 and 74 fahrenheit, inclusive. if t is the temperature in the laboratory, which of the following inequalities represents this situation? a. |72 - t| ≤ 2 b. |t - 2| ≤ 72 c. |t + 2| ≤ 72 d. |72 + t| ≤ 2

Correct choice is A

Step-by-step explanation:

Consider the inequality in option A. This inequality can be rewritten as

because tha absolute value for the expression is the sam as the absolute value for the expression

Then you can eliminate the absolute value sign:

Thus, the temperature in a laboratory is between 70 and 74 Fahrenheit, inclusive.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

49%

step-by-step explanation:

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