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Ira Lisetskai [31]

3 years ago

9

A triangle has a base of x½ m and a height of x¾ m. If the area of the triangle is 16 m2, what are the base and the height of th

e triangle?

1 answer:

Veseljchak [2.6K]3 years ago

5 0

Answer:

Base = 4.62m, Height = 6.93m

Step-by-step explanation:

I worked through the black first, then went to the blue.

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For every $12 Maria earns babysitting, she donates $2 to the local pet shelter. Last week, Maria earned a total of $60. Of the $

insens350 [35]

Answer is $14, I think.

4 0

3 years ago

At the school cafeteria, you can get 3 slices of pizza for $5.94. At this rate, how much would 7 slices cost, in dollars and cen

gavmur [86]

Answer:

$13.86

Step-by-step explanation:

$5.94 / 3 = $1.98

1 slice = $1.98

7 slices = $1.98 x 7 = $13.86

8 0

3 years ago

Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds)

zalisa [80]

Answer: $(57.41,\ 62.19)$

Step-by-step explanation:

Given : Sample size : $n=40$

Sample mean : $\overline{x}=59.8\text{ seconds}$

Standard deviation : $\sigma =9.2\text{ seconds}$

Significance level : $\alpha=1-0.9=0.1$

Critical value : $z_{\alpha/2}=1.645$

Formula to find the confidence interval for population mean :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=59.8\pm(1.645)\dfrac{9.2}{\sqrt{40}}\\\\\approx59.8\pm2.39\\\\=(59.8-2.39,\ 59.8+2.39)\\\\=(57.41,\ 62.19)$

Hence, a 90% confidence interval estimate of the population mean of all students = $(57.41,\ 62.19)$

6 0

3 years ago

If a train travels 80 m/s in two hours and 20 minutes, how far has it traveled?

Alexxx [7]

Answer:

distance = 585600 m

Step-by-step explanation:

change 2 hours 20 minutes to seconds

2 hrs * 60 minutes/1hr * 60 sec/min = 7200 sec

20 minutes * 60 sec/min = 120 sec

2 hr 20 min = 7320 seconds

distance = rate * time

distance = 80 m/s * 7320 s = 585600 m

8 0

3 years ago

Raiz cuadrada de 49?

beks73 [17]

Respuesta para tu pregunta jaja

5 0

3 years ago