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2 years ago

3.2 km is equivalent to which of the following? You may choose more than one correct answer

Mathematics

2 answers:

stiks02 [169]2 years ago

8 0

Options 2, 4, 6 are correct.

WITCHER [35]2 years ago

8 0

Answer: $3.2\times10^6\text{ mm}$

$=3.2\times10^5\text{ cm}$

$3.2\times10^3\text{ meters}$

Step-by-step explanation:

We know that 1 kilometer = 1000 meters

Therefore, $\text{3.2 kilometers =}3.2\times1000=3.2\times10^3\text{ meters}$

Also, 1 meter = 100 cm

Therefore, $3.2\times10^3\text{ meters}=3.2\times10^3\times100$

$=3.2\times10^3\times10^2=3.2\times10^{3+2}\\\\=3.2\times10^5\text{ cm}......\text{[ by product law of exponent]}$

Also, 1 cm = 100 mm

Therefore,

$3.2\times10^5\text{ cm}=3.2\times10^5\times10\\\\=3.2\times10^{5+1}=3.2\times10^6\text{ mm}......\text{[ by product law of exponent]}$

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To determine whether or not they have a certain disease, 150 people are to have their blood tested. However, rather than testing

Sophie [7]

Answer:

The answer is 75 tests for 150 people.

Step-by-step explanation:

Firstly, with 150 people, we can divide into 15 groups; and the probability of disease is 0.04, there are 6 persons who possibly get disease.

Therefor, the maximum number of groups with an individual getting disease is 6. Then, 6 * 11 tests = 66 tests required.

15 groups - 6 groups with disease = 9 groups of negative with 9 tests.

In conclusion, there are 75 tests required.

7 0

3 years ago

Please Help! Brainliest Answer!

Alla [95]

Answer:

Step-by-step explanation:

Using sine rule

a/sin A ＝b/sin B

8/sin90° ＝ x/sin60°

8 * sin60° ＝ x

x ＝

$4 \sqrt{3}$

6 0

2 years ago

Sanjay graphs a quadratic function that has x-intercepts of –3 and 7. Which functions could he have graphed?

kykrilka [37]

we will select each options and find zeros

(a)

$g(x)=x^2-4x-21$

for finding x-intercept , we can set g(x)=0

and then we can solve for x

$g(x)=x^2-4x-21=0$

now, we can factor it

$(x-7)(x+3)=0$

we get

$x=7,x=-3$

so, this is TRUE

(b)

$g(x)=(x-3)(x+7)$

we can set it to 0

and then we can solve for x

$g(x)=(x-3)(x+7)=0$

we get

$x=3,x=-7$

so, this is FALSE

(c)

$g(x)=3x^2-12x-63$

we can set it to 0

and then we can solve for x

$g(x)=3x^2-12x-63 =0$

$3(x^2-4x-21) =0$

$3(x-7)(x+3) =0$

$x=-3,x=7$

so, this is TRUE

(d)

$g(x)=-(x+3)(x-7)$

now, we can set it to 0

and then we can solve for x

$g(x)=-(x+3)(x-7)=0$

$x=-3,x=7$

so, this is TRUE

(e)

we have

$g(x)=x^2+4x-21$

now, we can set it to 0

and then we can solve for x

$g(x)=x^2+4x-21=0$

$(x+7)(x-3)=0$

$x=-7,x=3$

so, this is FALSE

5 0

2 years ago

Read 2 more answers

Please help will give brainliest and extra points.

Elza [17]

Im not sure about the given data but I plotted the scatter plot based on what I understand on how the data should be presented.

Time (years)

3, 6, 9, 12, 15, 18, 21, 24

Number of participants(x1000)

22, 25, 28, 14, 17, 20,15, 9

Attached is the scatter plot created online.

x = time (years)

y = number of participantep explanation

7 0

2 years ago

Cody made deposits of $45, $18, and $27 into his checking account. He then wrote checks for $21 and $93. Write an expression to

zysi [14]

<span>C = 45 + 18 + 27 - 21 - 93 C = -24 Let's use the variable C to represent the change in the balance in Cody's checking account. The easiest way to make the expression is to simply apply the additions and subtractions directly. So let's start with C C "Cody made deposits of $45, $18, and $27 into his checking account." C = 45 + 18 + 27 "He then wrote checks for $21 and $93." C = 45 + 18 + 27 - 21 - 93 So the expression to represent the change to Cody's checking account is C = 45 + 18 + 27 - 21 - 93 Now to simplify it. All you need to do is combine terms together. How far you go is up to you. So let's do it. C = 45 + 18 + 27 - 21 - 93 I'll add together all the deposits. C = (45 + 18 + 27) - 21 - 93 C = 90 - 21 - 93 And I'll combine the checks. C = 90 - 114 So now you can tell at a glance that Cody deposited $90 and wrote checks for $114. But we can make it simpler and combine those as well. So C = -24 And this tells you that Cody's checking account balance is now $24 lower than it was before he started making deposits and writing checks.</span>

5 0

2 years ago