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3 years ago

14

Kevin and Randy Muise have a jar containing 47 coins, all of which are either quarters or nickels. The total value of the coins

in the jar $8.15 How many of each type of coin do they have ?

1 answer:

SVETLANKA909090 [29]3 years ago

4 0

Ik but learn its simple but there is multiple answers

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A certain model car has a keypad with 5 numbers on the door. To open the door, 5 numbers must be entered in the correct

MrRissso [65]

Answer: A. $\dfrac{1}{120}$

Step-by-step explanation:

Total digits on keypad = 5

According to permutation,

If repetition of digits is not allowed then the number of 5-digits passwords can be formed = 5!

= 5 x 4 x 3 x 2 x 1 [n!=n x (n-1) x (n-2)x ... x 1]

=120

The probability that someone guesses the correct code = $\dfrac{\text{Number of correct codes}}{\text{Total possible codes}}$

$=\dfrac{1}{120}$

Hence, the correct option is A.

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3 years ago

Help plz i dont understand

max2010maxim [7]

Answer:

The answer is 90;

Step-by-step explanation:

since each variable has a given value, just plug the numbers into the equation.

3(6)5=90

Since there is no <em>d </em>in the equation, don't worry about it:)

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3 years ago

(-5)*+2+(3+1)<br> Help??

IRINA_888 [86]

Answer:

1

Step-by-step explanation:

(-5)+2+(3+1)

= -5+2+4

= -3+4

= 1

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3 years ago

A hemispherical tank is filled with water and has a diameter of 14 feet. If water

tigry1 [53]

Answer:

$44,826.72\ \text{pounds}$

Step-by-step explanation:

Given that,

The diameter of a hemispherical tank= 14 feet

Radius, r = 7 feet

water

Water weighs 62.4 pounds per cubic foot.

We need to find the total weight of the water in a full tank to the nearest pound.

The volume of the hemisphere is given by :

$V=\dfrac{2}{3}\pi r^3\\\\V=\dfrac{2}{3}\pi \times (7)^3\\\\V=718.377\ \text{feet}^3$

If water weighs 62.4 pounds per cubic foot, it means

$V=718.377\times 62.4\\\\V=44,826.72\ \text{pounds}$

So, the total weight of the water is $44,826.72\ \text{pounds}$ .

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3 years ago

Which value represents a percentage between 12% and 19%?

Natali [406]

Answer:

15.5%

Step-by-step explanation:

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3 years ago