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SIZIF [17.4K]
3 years ago
9

Multiply mentally. 4.2 × 200 HELP

Mathematics
2 answers:
vodka [1.7K]3 years ago
6 0
What u basically do is 4 x 200 = 800 then u do 2 x 2 = 840
Pani-rosa [81]3 years ago
4 0
4.2 times 200 equals 840. Hope this helps
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Drag each symbol and number to the correct location on the inequality. Not all symbols and numbers will be used. Sam initially i
galben [10]

Answer:

t \leq 18.67\ years

Step-by-step explanation:

we know that

The simple interest formula is equal to

A=P(1+rt)

where

A is the Final Investment Value

P is the Principal amount of money to be invested

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in this problem we have

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The inequality that represented this situation is

P(1+rt) \leq A

substitute the values and solve for t

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t \leq [(7,020/4,500)-1]/0.03

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7 0
3 years ago
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Assume that the wavelengths of photosynthetically active radiations (PAR) are uniformly distributed at integer nanometers in the
trasher [3.6K]

Answer:

Mean=685

Variance=36.7

Step-by-step explanation:

The mean of uniform discrete distribution can be expressed as the average of the boundaries

mean=( b+a)/2

The variance of uniform discrete distribution can be expressed as the difference of the boundaries decreased by 1 and squared, decreased by 1 and divided by 12.

σ²=[(b-a+1)^2 - 1]/12

We were given the wavelength from from 675 to 695 nm which means

a= 675, b= 695

We can now calculate the mean by using the expresion below

mean=( b+a)/2

Mean=( 675 + 695)/2

=685

The variance can be calculated by using the expression below

σ²=[(b-a+1)^2 - 1]/12

σ²=[(695-675+1)^2 -1]/12

σ²=440/12

σ²=36.7

Therefore, the the mean and variance, of the wavelength distribution for this radiation are 685 and 36.7 respectively

7 0
3 years ago
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