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3 years ago

97% of steel is made of iron. If there are 500 lbs of steel, approximately how many pounds are iron?

Mathematics

1 answer:

I am Lyosha [343]3 years ago

6 0

Answer:

485 Pounds of Iron

Step-by-step explanation:

500 x 97% or 500 x 0.97 = 485.

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(-5)² = -2³= (-3) y el 5 chiquito arriba pero no me deja ponerlo = (-2)⁴= (-6)º=

natita [175]

Answer:

Hai

(-5)² = +25. i dont write - because 2 is a binary number.

-2³ = -8

(-3)(small5) = -243

(-2)⁴= +16

(-6)º= 1 ( because if any number's power is 0, then we can just write there 1.

good luck (:

3 0

3 years ago

Given that A varies directly as B and inversely as C and that; A=12 when B=3 and C=2. Find B when A=10 and C=1.5

maria [59]

Answer:

B = 1.875

Step-by-step explanation:

given that A varies directly as B and inversely as C then the equation relating them is

A = $\frac{kB}{C}$ ← k is the constant of variation

to find k use the condition A = 12 when B = 3 and C = 2 , then

12 = $\frac{3k}{2}$ ( multiply both sides by 2 to clear the fraction )

24 = 3k ( divide both sides by 3 )

8 = k

A = $\frac{8B}{C}$ ← equation of variation

when A = 10 and C = 1.5 , then

10 = $\frac{8B}{1.5}$ ( multiply both sides by 1.5 )

15 = 8B ( divide both sides by 8 )

1.875 = B

8 0

2 years ago

Generate the first 5 terms of this sequence:

AURORKA [14]

We are given f(1) = 0 and f(2) = 1. Going forward, the term is the sum of the two previous terms. f(3) = f(2) + f(1) = 0 + 1 = 1. f(4) = f(3) + f(2) = 1 + 1 = 2 f(5) = f(4) + f(3) = 2 + 1 = 3 This matches answer B.

4 0

3 years ago

A group of 50 New York psychology students got a mean score of 530 on the psychology GRE with a standard deviation of 80. These

lesantik [10]

Answer: No, New York students are not truly more nerdy than the California students.

Step-by-step explanation:

Since we have given that

Number of students in a group = 50

Mean score of New York psychology = 530

Mean score of California psychology = 515

Standard deviation = 80

So, we will find t-distribution first.

$t=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\t=\dfrac{530-515}{\dfrac{80}{\sqrt{50}}}\\\\t=1.32$

Let α = 5% = 0.05

So, $t_{\alpha,2}=2.920$

Since t < t(critical value)

No, New York students are not truly more nerdy than the California students.

3 0

4 years ago

8x = 96 How would I solve for x

Vaselesa [24]

How to solve your problem

6 0

3 years ago

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