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3 years ago

Plus help I need it fast

Mathematics

2 answers:

GrogVix [38]3 years ago

5 0

Answer:

Rains and Splash

Step-by-step explanation:

2 verbs rains and splash

Paul [167]3 years ago

5 0

Answer: RAINS AND AROUND

Step-by-step explanation:

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A game costs $39.00. But the new special edition version is going to be $56.94. What is the increased percent?

astraxan [27]

Answer:

46%

Step-by-step explanation:

Step 1: Make an expression

$39.00 * x = 56.94$

$39x = 56.94$

Step 2: Divide both sides by 39

$39x / 39 = 56.94 / 39$

$x = 1.46$

Step 3: Find the percent

$1.46 - 1$ -> Gives us the increased percent

$0.46 * 100$

46%

Answer: 46%

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3 years ago

Iist two different combinations if coins,each with value of 30% of a dollar.(ex: 3 dimes) PLS HELP ME

posledela

Answer:

6 nickles

2 dimes 2 nickles

1 quarter 1 nickle 5 pennys

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3 years ago

Merideth measured 3.25 cups of flour and 1.625 cups of brown sugar into

Fiesta28 [93]

Answer:

Step-by-step explanation:

This is just an addition question. If you have a calculator just add the numbers.

3.25 + 1.625 = 4.875 cups in the bowl.

Sometimes you can use another method. Sometimes it is shorter.

3 1/4 + 1 5/8 = 3 2/8 + 1 5/8 = 4 7/8.

7/8 = 0.875

3 0

3 years ago

Please help me im doing a test

Reptile [31]

Answer:

D I think

Step-by-step explanation:

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3 years ago

The amount A of the radioactive element radium in a sample decays at a rate proportional to the amount of radium present. Given

slavikrds [6]

Answer:

a) $\frac{dm}{dt} = -k\cdot m$ , b) $m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$ , c) $m(t) = 10\cdot e^{-\frac{t}{2438.155} }$ , d) $m(300) \approx 8.842\,g$

Step-by-step explanation:

a) Let assume an initial mass m decaying at a constant rate k throughout time, the differential equation is:

$\frac{dm}{dt} = -k\cdot m$

b) The general solution is found after separating variables and integrating each sides:

$m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$

Where $\tau$ is the time constant and $k = \frac{1}{\tau}$

c) The time constant is:

$\tau = \frac{1690\,yr}{\ln 2}$

$\tau = 2438.155\,yr$

The particular solution of the differential equation is:

$m(t) = 10\cdot e^{-\frac{t}{2438.155} }$

d) The amount of radium after 300 years is:

$m(300) \approx 8.842\,g$

4 0

3 years ago

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Plus help I need it fast​

Plus help I need it fast