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12345 [234]
3 years ago
12

Please can someone help me

Mathematics
2 answers:
stiv31 [10]3 years ago
6 0
The answer is 11/12.
GaryK [48]3 years ago
3 0

Answer:

11/12

Step-by-step explanation:

10/24 + 12/24 = 22/24

22/24 = 11/12

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john drives to the beach,which is 270 miles away. in 2 hours, he drives 120 miles. if he continues at that speed, how long will
Kazeer [188]
So John is driving 60 miles per hour. So John would get their in 4 hours and 25-30 min

3 0
3 years ago
Read 2 more answers
Element X is a radioactive isotope such that its mass decreases by 26% every day. If an experiment starts out with 810 grams of
ioda

Answer:

The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

The function to represent the mass of the sample after t days is A(t) = 810(0.74)^t

Step-by-step explanation:

Exponential equation of decay:

The exponential equation for the amount of a substance is given by:

A(t) = A(0)(1-r)^t

In which A(0) is the initial amount and r is the decay rate, as a decimal.

Hourly rate of change:

Decreases 26% by day. A day has 24 hours. This means that A(24) = (1-0.26)A(0) = 0.74A(0); We use this to find r.

A(t) = A(0)(1-r)^t

0.74A(0) = A(0)(1-r)^{24}

(1-r)^{24} = 0.74

\sqrt[24]{(1-r)^{24}} = \sqrt[24]{0.74}

1 - r = (0.74)^{\frac{1}{24}}

1 - r = 0.9875

r = 1 - 0.9875 = 0.0125

The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

Starts out with 810 grams of Element X

This means that A(0) = 810

Element X is a radioactive isotope such that its mass decreases by 26% every day.

This means that we use, for this equation, r = 0.26.

The equation is:

A(t) = A(0)(1-r)^t

A(t) = 810(1 - 0.26)^t

A(t) = 810(0.74)^t

The function to represent the mass of the sample after t days is A(t) = 810(0.74)^t

5 0
3 years ago
The diameter of a circle is 3 meters. what is the radius of the circle?
Alex73 [517]

The radius of a circle is half the length of the diameter so

radius=1.5m

6 0
3 years ago
Read 2 more answers
WHY must the same operation be performed on both sides of an equation? ​
lys-0071 [83]

Answer:When you are given a problem, the two sides are equal, so they are equally weighted. As long as you do the same thing on both sides, they remain the same weight. The only way that one side can become "more weight" on a side is if you make a math mistake, and thus the answer would not satisfy the original equation

Step-by-step explanation:looked it up... have a good day!

8 0
3 years ago
8x11=(8x10)+(1x10) how can I make it true?
icang [17]
You could make it true by making it (8x10) plus (8x1)

Explanation: 8x11=88 and 8x10=80 and 8x1=8 and 80+8=88
6 0
3 years ago
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