What is the subsets of 10

Jesse is traveling up and down a stream in a kayak. He can paddle the kayak at an average rate of 5 miles/hour, and the round-tr

Ostrovityanka [42]

The time it takes = 3 hours 12 minutes

Rate is a ratio which compares two quantities of different units.

Analysis:

Speed = 5 miles/hour

distance covered = 16 miles

speed taken = distance covered/time taken

time taken = 16/ 5 = 3.2 hours = 3 hours 12 minutes

Learn more about Rate: brainly.com/question/24304697

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7 0

1 year ago

Using traditional methods, it takes 108 hours to receive a basic driving license. A new license training method using Computer A

Rainbow [258]

Answer: z= -2.35

Step-by-step explanation:

When the population variation is know, then we calculate the z-statistic.

Formula to calculate the z-test statistic is given by :-

$z=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}$

where , n= sample size

$\overline{x}$ = sample mean

$\mu$ = Population mean

$\sigma$ =Population standard deviation.

As per given we have,

n= 270

$\mu= 108$

$\overline{x}=107$

$\sigma^2=49\\\\\Rightarrow \sigma=\sqrt{49}=7$

Then, z-statistic will be

$z=\dfrac{107-108}{\dfrac{7}{\sqrt{270}}}$ (Substitute all the values )

$\Rightarrow\ z=\dfrac{-1}{\dfrac{7}{16.4316767252}}$

$\Rightarrow\ z=\dfrac{-1}{0.426006433614}$

$\Rightarrow\ z=-2.34738238931\approx-2.35$

Hence, the value of the test statistic= z= -2.35

4 0

3 years ago

Write the quadratic equation whose roots are -1 and -5 , and whose leading coefficient is 2 . (Use the letter to represent the v

geniusboy [140]

Answer:

$2x^2+12x+10=0$

Step-by-step explanation:

When you have the roots r1, r2 and the leading coefficient a of a quadratic equation, its factorization is

a(x - r1)(x - r2)

and the quadratic equation would be

a(x - r1)(x - r2) = 0

In this case r1 = -1, r2 = -5 and a = 2, so the quadratic equation is

$\large 2(x-(-1))(x-(-5))=0\Rightarrow 2(x+1)(x+5)=0\Rightarrow\\\\\Rightarrow2(x^2+5x+x+5)=0\Rightarrow2(x^2+6x+5)=0\Rightarrow\\\\\boxed{2x^2+12x+10=0}$

3 0

3 years ago

A basketball team wants to paint half of a free-throw circle grey. If the radius of the free-throw circle is 5.4 feet, what is t

FromTheMoon [43]

Answer:

The area which would be painted grey will be "47.7812 ft²".

Step-by-step explanation:

The given values are:

Radius of circle, r = 5.4 feet

Value of pi, π = 3.14

As we know,

Area of Semicircle = $\frac{\pi r^2}{2}$

On putting the values in the above formula, we get

= $\frac{3.14\times (5.4)^{2}}{2}$

= $\frac{3.14\times 29.26}{2}$

= $\frac{91.5624}{2}$

= $45.7812 \ ft^2$

5 0

2 years ago

Loại ngôn ngữ lập trình được đông đảo người lập trình lựa chọn là?

Hoochie [10]

Answer:

JavaScript

Step-by-step explanation: Đó là lý do JavaScript nên đứng đầu tiên trong danh sách ngôn ngữ lập trình thích hợp cho người mới bắt đầu. Theo khảo sát mới nhất trên Stack Overflow – “phao cứu sinh” của developer, JavaScript là ngôn ngữ phổ biến nhất được sử dụng rộng rãi trong vòng 8 năm qua

5 0

2 years ago