3 years ago

Evaluate: 5ab when a = 4 and b = 2.5

Mathematics

1 answer:

Zina [86]3 years ago

6 0

Answer:

50 ur welcome

Step-by-step explanation:

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Determine the margin of error in estimating the population mean, μ . A sample of 74 college students yields a mean annual income

Julli [10]

Answer:

$253

Step-by-step explanation:

Margin of error is the critical value times the standard error.

MoE = z × σ/√n

At 99% confidence, z = 2.576.

MoE = 2.576 × 844/√74

MoE = 253

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4 years ago

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Margaret [11]

Answer:

Step-by-step explanation:

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3 years ago

Adam is a team leader for a packing and moving company. Today, his team packed 96 boxes in 4 hours. What was his team's packing

Brut [27]

If his team packs 96 boxes in 4 hours, then in 1 hour, they pack 96/4 = 24. So, the answer is, they pack 24 boxes/hour.

4 0

4 years ago

If f(x) = x2 + 2x + 3, what is the average rate of change of Rx) over the interval (-4, 6]?

JulijaS [17]

Answer:

Step-by-step explanation:

The average rate of change of a function over an interval is simply the slope over the interval because:

$let \: g(x)=f'(x)\\\frac{\int\limits^b_a {g(x)} \, dx }{b-a}(the\:average\:value\:of\:g)=\frac{f(b)-f(a)}{b-a}$

We have to know f(6) and f(-4)

$f(x) = x^2 + 2x + 3\\f(6) = 6^2 + 2(6) + 3\\f(6) = 36 + 12 + 3\\f(6) = 51\\\\f(-4) = (-4)^2 + 2(-4) + 3\\f(-4) = 16 - 8 + 3\\f(-4) = 11\\\\\frac{f(6)-f(-4)}{6-(-4)} = \frac{51-11}{10} = \frac{40}{10} = 4$

3 0

3 years ago

For parallelogram LMNO, if angle L=4x-25 and angle N=3x+18, find angle M

RUDIKE [14]

L=N (because opposite angle of parllalogram is euqal)

4X-25= 3X+18
X =43

there for angle N=3×43+18
N=147

Now we know that the sum of the corresponding angle of a parllalogram is 180
N+M=180
M=180-147

M=33

3 0

3 years ago