3 years ago

Which table shows the function y=2x+4?

Mathematics

1 answer:

Varvara68 [4.7K]3 years ago

6 0

A is the answer. Work is shown below

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What is the absolute value of 8.5?

castortr0y [4]

8.5 correct me if i am wrong.

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3 years ago

The standard diameter of a golf ball is 42.67 mm.

iris [78.8K]

B should be the only correct answer.

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4 years ago

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The access code to a houses security system consists of 6 digits. How many different codes are available if each digit can be re

Vladimir79 [104]

Answer:

1,000,000

Step-by-step explanation: Since there are 10 possible digits, we know that there is a 1/10 chance for any possible digit in any slot. So, since there are 6 slots we can do 1/10^6, or 1 in 1 million.

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3 years ago

A 41 gram sample of a substance that's used to detect explosives has a k-value of 0.1392. Find the substance's half life, in day

-BARSIC- [3]

Answer:

The substance half-life is of 4.98 days.

Step-by-step explanation:

Equation for an amount of a decaying substance:

The equation for the amount of a substance that decay exponentially has the following format:

$A(t) = A(0)e^{-kt}$

In which k is the decay rate, as a decimal.

k-value of 0.1392.

This means that:

$A(t) = A(0)e^{-0.1392t}$

Find the substance's half life, in days.

This is t for which $A(t) = 0.5A(0)$ . So

$A(t) = A(0)e^{-0.1392t}$

$0.5A(0) = A(0)e^{-0.1392t}$

$e^{-0.1392t} = 0.5$

$\ln{e^{-0.1392t}} = \ln{0.5}$

$-0.1392t = \ln{0.5}$

$t = -\frac{\ln{0.5}}{0.1392}$

$t = 4.98$

The substance half-life is of 4.98 days.

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3 years ago

PLEASE HELP!!! Hello, I've really been struggling with trying to figure these out, can someone please help me with these?

kap26 [50]

These are the answers I think may be correct:

- 60 ways
- 45
- 30/53 chance

7 0

3 years ago