Problem solving multiplication

2 answers:

5 0

Multiplication word problems arise in situations where we do repeated addition of the same number. Think of multiplication as a shortcut for adding the same number multiple times.

Cerrena [4.2K]3 years ago

3 0

With what you just said problem with solving multiplication

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If Jeffrey invested $2,000 (principal) for 5 years at 5% interest rate compounded annually how much Interest would he earn over

garik1379 [7]

Answer:

Total = principal * (1+ rate/100)^ years

Total = 2,000 * 1.05^5

Total = 2,000 * 1.2762815625

Total = 2,552.36

Source: http://www.1728.org/compint2.htm

Step-by-step explanation:

3 0

3 years ago

Sibal started with $500 in a bank account that does not earn interest. In the middle of every month, she withdraws 1/5 of the ac

GalinKa [24]

4/5 of the original amount at the start of the month will remain. The amount at the start of every month will change. Thus:
an = 4/5 (an-1) ; where a1 = 500.

5 0

4 years ago

the half-life of strontium-90 is approximately 29 years. how much of a 500 g sample of strontium-90 will remain after 58 years

Yuliya22 [10]

Answer: 125 g

<u>Step-by-step explanation:</u>

$A = P_o\cdot e^{kt}\\\\\text{First, use the given information to find k:}\\\\\bullet A=\dfrac{1}{2}P_o\\\\\bullet k = unknown\\\\\bullet t=29\text{ years}\\\\\dfrac{1}{2}P_o=P_o\cdot e^{k(29)}\\\\\\\dfrac{1}{2}=e^{k(29)}\qquad divided\ both\ sides\ by\ P_o\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=ln\bigg(e^{k(29)}\bigg)\qquad applied\ ln\ to\ both\ sides\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=29k\qquad simplified-ln\ and\ e\ cancel\ out\\\\\\\dfrac{ln\bigg(\dfrac{1}{2}\bigg)}{29}=k\qquad divided\ 29\ from\ both\ sides\\\\\\-0.0239=k$

$\text{Now, use the following in the equation to solve for A:}\\\\\bullet A=unknown\\\bullet P_o=500\\\bullet k=-0.0239\\\bullet t=58\text{ years}\\\\A=500\cdot e^{(-0.0239)(58)}\\\\.\quad=500\cdot e^{-1.386}\\\\.\quad=125$

8 0

4 years ago

Make a set of numbers that use all the digits from 1 to 9, once and once only.

expeople1 [14]

Answer:

2×6729=13458

Step-by-step explanation:

3 0

4 years ago

Which angle is an x–intercept for the function y= cos(/<br> x)

emmasim [6.3K]

For the function
y = cos(1/2 x)
The x-intercept can be calculated by equating the function to zero and solving for x. So,
y = cos(1/2 x) = 0
1/2 x = arc cos 0
1/2 x = 90° +180°n
x =2 (90° +180°n)
x = 180° + 360°n
or converting to radians
x = (180° + 360° n)(π/180°)
x = π + 2π n
where n is any whole number

if n = 0
x = π

6 0

3 years ago