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3 years ago

Hey, I'm dumb and need help.

Mathematics

1 answer:

Lapatulllka [165]3 years ago

5 0

Answer:

Parallelogram.

Alternate Interior angle.

Reflexive.

ASA

Step-by-step explanation:

AS for the last part i've only seen it in the States. Its something like CBCDC.

Basically it means the sides are congruent because they are corresponding sides of 2 congruent triangles.

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Find area plsssssssssssssssss ty

natka813 [3]

Answer:

1,200

Step-by-step explanation:

20 X 12 X 5 = 1,200

7 0

3 years ago

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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

A traveling soccer team allows only the top 3% of athletes who try out to be part of the team. If the team tryout scorecard has

skad [1K]

Answer:

169

Step-by-step explanation:

You need to use a Z-table for this.

There are different tables, in this table i searched for the probability of 97% because that equivalent to the top 3%.

for 0.97, Z = 1.88

The formula of Z is:

$Z = (x-mean)/(st. dev.)$

Solving x:

$1.88 = (x-150)/10 \\x = 168.8 = 169$

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3 years ago

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A woman at your company saves 10% of her salary.what fraction of her salary doe she save?

elena55 [62]

She saves 1/10 of her salary. That's the simplified version, it can also be written 10/100. Fractions, decimals, and percentages are all interchangeable.

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3 years ago

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When solving 325 ÷ 5, you end up with the partial quotients of: 10 + 10 + 10 + 10 + 10 + 10 + 5

kolezko [41]

Answer:

130

Step-by-step explanation:

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2 years ago