I need help I’m rlly stupid at the moment

Mathematics

1 answer:

Elanso [62]2 years ago

8 0

Answer: 4

Step-by-step explanation: We can rewrite this as 5 1/4 - 1 1/4 which equals 4.

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Find the surface area and the volume of the figure Round to the nearest tenth if needed.

elixir [45]

Answer:

See below

Step-by-step explanation:

Surface area:

S = 2(lw + lh + wh) + 2πrh
S = 2(9*4 + 9*5 + 4*5) + 2*3.14*2*3 = 239.7 cm² (rounded)

Volume:

V = lwh + πr²h
V = 9*4*5 + 3.14*2²*3 = 217.7 cm³ (rounded)

4 0

2 years ago

Read 2 more answers

In the chart below shade each day that Ned will swim,circle each day Ned will bicycle

klasskru [66]

We're willing, but sadly not able.

Here's are the other things we'll need before we can attack this one:

1). We need to know how often does Ned swim ?

2). We need to know how often does Ned bicycle ?

3). We need to see that "chart below".

The only thing I see below right now is my dog.

3 0

2 years ago

A market research analyst claims that 32% of the people who visit the mall actually make a purchase. You think that less than 32

Rainbow [258]

Answer:

E. -1.48

Step-by-step explanation:

The test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the expected value, $\sigma$ is the standard deviation and n is the size of the sample.

A market research analyst claims that 32% of the people who visit the mall actually make a purchase.

This means that:

$\mu = 0.32$

$\sigma = \sqrt{0.32*0.68} = 0.4665$

You stand by the exit door of the mall starting at noon and ask 82 people as they are leaving whether they bought anything. You find that only 20 people made a purchase.

This means that $n = 82, X = \frac{20}{82} = 0.2439$