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sdas [7]
4 years ago
5

He access code for a​ car's security system consists of four digits. the first digit cannot be 8 and the last digit must be even

. how many different codes are​ available? the number of different codes available is nothing .
Mathematics
1 answer:
Naya [18.7K]4 years ago
7 0

There are 10 total numbers ( 0, 1, 2,3, 4, 5, 6, 7, 8, 9)

The first number cannot be an 8, so it can be 9 different numbers.

The second number can be any of 10 numbers.

The third number can also be any of 10 numbers.

The fourth number can only be even so it can be 0, 2 , 4, 6, 8, so any of 5 numbers.

To find the total combinations, multiply the available choices by each other:

9 x 10 x 10 x 5 = 4,500 different combinations.

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The head-to-tail length of a species of fish is normally distributed, with a
UkoKoshka [18]

Answer:

C. -0.34

Step-by-step explanation:

We have that for a normal distribution, the value of z can be calculated using the following formula:

z = (x - m) / sd

where x is the value to evaluate, m the mean and sd the standard deviation, we have those values x = 16.3, m = 17.4 and sd = 3.2

if we replace we have:

z = (16.3 - 17.4) /3.2

z = -0.3437

if we round to 2 decimal places, it would be -0.34, that is, the answer is C.

3 0
3 years ago
The triangular pyramid shown is made up of four congruent triangles. The length of the base is 8 inches, and the height of the b
Aneli [31]

Answer:

(B) Talia is correct. The lateral area can be found by approximating one large triangle, which can be found using the expression 4 (one-half (8) (6.9))

Step-by-step explanation:

Base of the Pyramid = 8 Inches

Height of the Triangular Face = 6.9 Inches

In any solid shape, the Lateral surface area is the sum of all sides except its top and bottom bases.

Since the four triangles are congruent:

Lateral Surface Area = 4 X Area of One Triangle

Area of a Triangle = \frac{1}{2}$ X Base X Height

Area of one Triangular Face = \dfrac{1}{2}(8)(6.9)

Therefore:

Lateral Surface Area = 4\left(\dfrac{1}{2}(8)(6.9)\right)

Therefore, Talia is correct.

8 0
3 years ago
The yield from silver queen was compared to the yield of country gentlemen. Note: Differences were taken by taking Silver Queen
Mumz [18]

Answer:

-0.223 \leq \mu_{sylver} -\mu_{Country} \leq 0.988

We can conclude that the difference between the two means are between -0.223 and 0.988.

And for this case the confidence interval contains the value of 0 so then we have enough evidence to conclude that we don't have significant difference between the means of Silver Queen and the Country Gentlemen.

Step-by-step explanation:

For this case we have the following interval for the difference between Silver Queen - Country Gentlemen:

-0.223 \leq \mu_{sylver} -\mu_{Country} \leq 0.988

We can conclude that the difference between the two means are between -0.223 and 0.988.

And for this case the confidence interval contains the value of 0 so then we have enough evidence to conclude that we don't have significant difference between the means of Silver Queen and the Country Gentlemen.

6 0
4 years ago
Convert into a mixed number 37/8=​
Brilliant_brown [7]

Answer: Here is a bundle of Examples! Hope this helps!

Step-by-step explanation:

As an improper fraction. (numerator larger than denominator): 37/8 = 37/8

As a mixed number (mixed fraction) (a whole number and a proper fraction, of the same sign): 37/8 = 4 5/8

As a decimal number: 37/8 ≈ 4.63.

As a percentage: 37/8 = 462.5%

4 0
4 years ago
Read 2 more answers
How would the volume of a rectangular prism change if each side of the prism has doubled in length?
Artist 52 [7]
V(old)=a*b*c
Volume(new)=2a*2b*2c=8abc=8V(old)
volume will increase by 8 times
6 0
4 years ago
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