Answer: OK So Remember that perimeter P=2L+2W where L is the length and W is the width. If the length is 80 feet longer than the width, we can write the expression L=80+W. Substituting into P=2L+2W we get P=2(80+W)+2W=160+2W+2W=160+4W. Since P=300, we can say 300=160+4W. Subtracting 160 from each side we get 140=4W. Dividing each side by 4 gives 35=W. Substituting this into L=80+W gives L=80+35=115. So the length is 115 feet.
Step-by-step explanation:
Answer:
x=5
Step-by-step explanation:
Answer:
16%
Step-by-step explanation:
Calculate the z score.
z = (x − μ) / σ
z = (2.5 − 3.1) / 0.6
z = -1
According to empirical rule, 68% is between -1 and +1 standard deviations.
P(-1 < Z < 1) = 68%
Since normal distributions are symmetrical, 34% is between -1 and 0 standard deviations.
P(-1 < Z < 0) = 68% / 2 = 34%
And since 50% is less than 0 standard deviations, that means 16% is less than -1 standard deviations.
P(Z < -1) = 50% − 34% = 16%
➣ Assignment:
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➣ Answer:
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Explanation: ↓↓↓↓↓
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➤ [ Step One ] Follow PEMDAS Order Of Operations
➤ [ Step Two ] Rewrite Equation
➤ [ Step Three ] Calculate Within Parenthesis
➤ [ Step Four ] Rewrite Equation
➤ [ Step Five ] Multiply
➤ [ Step Six ] Rewrite Equation
➤ [ Step Seven ] Calculate Exponents
➤ [ Step Eight ] Rewrite Equation
➤ [ Step Nine ] Solve
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