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Free_Kalibri [48]
2 years ago
12

A 78 gram sample of Uranium loses half of its mass each year. What is the exponential equation? Please explain why A is the corr

ect answer
A. y=78(0.5)^x


B. y=78(1.5)^x
Mathematics
1 answer:
Fiesta28 [93]2 years ago
8 0

Answer:

A

Step-by-step explanation:

The first answer is correct because we have a decay factor.

The sample is losing mass, so the number that is being multiplied by a power of x must be less than 1.

If the second answer were used, then the sample would be gaining mass.

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One serving of Gooey Gushers provides 12% of the daily value of vitamin C. Tim ate 312 servings of Gooey Gushers.
Studentka2010 [4]

Answer:

a) Given expression,

12% of 312

Since 100% of 312 = 312

⇒ 10% of 312 = 31.2,

⇒ 1% = 3.12

⇒ 2% = 2 × 3.12 = 6.24

So, 12% of 312 = 10% of 312 + 2% of 312

= 31.2 + 6.24

= 37.44

b) Given,

Total number of servings = 312,

The percentage of vitamin C in each serving = 12%,

Thus, the total amount of the vitamin C in 312 servings = 12% of 312

=\frac{12\times 312}{100}

=\frac{3744}{100}

= 37.44,

Hence, the question can be asked about the total amount of the vitamin C.

6 0
3 years ago
. Find the range of the data.<br><br> 7,4, 12, 1, 8, 8, 4, 14, 13, 9, 11, 10, 2,7,5, 3, 1, 8,5,3
Burka [1]

Answer:

Range: 13

Step-by-step explanation:

Population size:20

Lowest value: 1

Highest value: 14

Answer: 13

<em><u>Hope this helps.</u></em>

5 0
2 years ago
Solve the equation 6x^2 + 15x + 3= 2x^2 to the nearest tenth.
Slav-nsk [51]

Answer:

x = -0.2 and x = -3.5

Step-by-step explanation:

Combine like terms in the given equation, by subtracting 2x^2 from both sides:

6x^2 + 15x + 3 = 2x^2

-2x^2                = -2x^2

----------------------------------

4x^2 + 15x + 3 = 0

This is a quadratic equation.  We'll find the two solutions using the quadratic equation

      -b ± √(b^2 - 4ac)

x = ---------------------------

                  2a

Here the coefficients of the quadratic are a = 4, b = 15 and c = 3.

Thus, the discriminant b^2 - 4ac is 15^2 - 4(4)(3), or +177

and from that we know we'll find two real, unequal roots.

                                -15 ± √177

The roots are:  x = ------------------- , or x = -0.2 and x = -3.5

                                         8

5 0
2 years ago
Linda constructs a triangle with one side 5 inches long and another side 7 inches long. Which is not a possible lenght for the t
Soloha48 [4]

Answer:

2 inch (or less);

12 inch (or more)

3 0
3 years ago
Read 2 more answers
Marla had a piece of felt that is 1/3 of a large circle. She cuts the piece of felt in half from the center point of the circle.
Aloiza [94]
It would be 60 dgrees since half of 1/3 is 1/6 and a circle is 360 degrees so do 360/6 to get 60 degrees.
6 0
3 years ago
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