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4 years ago

WHAT IS 17 TIMES 38 IN MATH

Mathematics

2 answers:

Stels [109]4 years ago

6 0

17 × 38 =646 :)) this is the answer

Black_prince [1.1K]4 years ago

5 0

♥ 17*38=<span>646</span><span>
To solve this, as it says, you will need to multiply.
Now if you didn't know
the word "times" means to multiply, and multiplying makes this symbol: x or otherwise known as *
♥Hope this helps!♥</span>

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The claim is that the standard deviation of the speeds of drivers in Bradford is 8 mph. An experienced driver feels that this is

Irina-Kira [14]

Answer:

Null hypothesis is rejected. Standard deviation is > 8 miles per hour

Step-by-step explanation:

σ [Population standard deviation] = 8 , s [sample standard deviation] = s

n [no of items] = 8

H0 [Null] : σ = 8 ; H1 [Alternate - Right Tail] : σ > 8

χ2 = (n - 1) . s^2 / σ^2

= 49 x (10.5)^2 / 82 = 5402.25 / 64

χ2 = 84.410

df [degree of freedom] = n -1 = 50 - 1 = 49

P value (χ^2 49 > 84.410) = 0.00125

p = 0.0013

p < α ie 0.05

So, H0 is rejected

Hence we state that standard deviation is > 8 miles per hpur

6 0

4 years ago

6. The base of a triangular field is three times its height. If the cost of cultivating the field

dedylja [7]

Answer:

base = 519.62, height = 173.21 m

Step-by-step explanation:

Let the base and height of the triangle be represented by b and h respectively.

Thus,

b = 3h

Area of a triangle = $\frac{1}{2}$ x base x height

For the given triangle,

area = $\frac{1}{2}$ x b x 3h

= $\frac{3}{2}$ bh

Area of the triangle = $\frac{3}{2}$ bh

To determine the number of hectares,

36 per hectare = 486

hectare = $\frac{486}{36}$

= 13.5

numbers of hectares = 13.5

Area of the hectares = number of hectares x 10 000 m²

= 13.5 x 10 000

= 135000

Total area of the hectares = 135 000 m²

So that,

area of the hectares = area of the triangle

area of the triangle = $\frac{3}{2}$ bh

135 000 = $\frac{3}{2}$ bh

270000 = 3bh

bh = $\frac{270000}{3}$

= 90000

bh = 90000

But, b = 3h

3h x h = 90000

3 $h^{2}$ = 90000

$h^{2}$ = $\frac{90000}{3}$

= 30000

h = $\sqrt{30000}$

= 173.2051

h = 173.21 m

So that,

b = 3 x 173.2051

= 519.6153

b = 519.62

Therefore, the base of the triangle is 519.62 m, while the height is 173.21 m.

7 0

4 years ago

a coffee retailer has two grades of decaffeinated coffee beans, one wholesales at $4.00 a pound and the other for 6.50 a pound.

RoseWind [281]

Answer:

Step-by-step explanation:

To solve mixture problems like this the best way is to make a table. Here's the basic format of the table we will use, calling the first coffee C1 and the second coffee C2:

#lbs x $/lb = Total

Mix

This is the table we will fill in. First, we were given the cost per pound of each type of coffee, so we put that in first:

#lbs x $/lb = Total

C1 4

C2 6.50

Mix

Next, we are told that she wants to make a mix of these coffees so she has a total number of pounds as 150 and that she wants it to cost $4.75 per pound. That goes in next:

#lbs x $/lb = Total

C1 4

C2 6.50

Mix 150 * 4.75

That asterisk is the multiplication sign.

Here's where we are now responsible for filling out the rest of the chart. If she needs to mix these 2 coffees to get a mix that is `150 pounds, she can have x pounds of C1 which means that she has to have 150 - x of C2:

#lbs x $/lb = Total

C1 x * 4

C2 150 - x * 6.50

Mix 150 * 4.75

Now all we have left to do is what the table tells us to do, which is to multiply the first 2 columns and put that product under the Total column:

#lbs x $/lb = Total

C1 x * 4 = 4x

C2 150 - x * 6.50 = 975 - 6.50x

Mix 150 * 4.75 = 712.50

Since we have to add the 2 coffees together to get the pounds of mix in the first column, we also have to add the cost of those coffees together to get the total cost of the mix. The equation looks like this:

4x + 975 - 6.50x = 712.50 and combining like terms:

-2.5x = -262.5 so

x = 105

That means that there is 105 pounds of coffee 1 and 150 - 105 pounds of coffee 2.

C1 = 105 pounds, C2 = 45 pounds

3 0

3 years ago

Solve without using calculator

antiseptic1488 [7]

Just secretly use a calculator... And show your working log square root of 2 and so on...

5 0

3 years ago

WILL GIVE BRAINLIEST + 8 POINTS PLEASE HELP I NEED THIS QUESTION ANSWERED IN LESS THAN 25 MINUTES!!! EMERGENCY!!! Either Table A

goldfiish [28.3K]

Answer:

its table a because all of the numbers are multiples of each other hope this helped

Step-by-step explanation:

6 0

4 years ago