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Mathematics

2 answers:

Fed [463]3 years ago

7 0

Answer:

Square root of 54 and square root of 120

Step-by-step explanation:

lina2011 [118]3 years ago

3 0

Answer:

$\sqrt{54}$ and $\sqrt{120}$

Step-by-step explanation:

If a number 'x' is a perfect square, then $\sqrt{x}$ is rational.

25, 36 and 81 are perfect squares, but 54 and 120 aren't, so the irrational values are $\sqrt{54}$ and $\sqrt{120}$

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Choose as many answers as apply.

alexandr1967 [171]

Answer:

multiplying a multi-digit number by itself several times (finding the power of a number)
finding a square root
statistical calculations

Step-by-step explanation:

We don't know what your introduction tells you, but the above-listed operations are ones I choose to use a calculator for. I also use a calculator for ordinary arithmetic, such as division by numbers with 2 digits or more. (It is simply faster and requires no scratch paper.)

If statistical calculations are not done with a calculator, they at least require the availability of suitable tables.

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All of these operations can be done by hand without a calculator, and were in times passed. Lifetimes of effort were involved in generating some of the original math tables for statistics, trig, logarithms, and other functions readily evaluated using a modern calculator.

3 0

3 years ago

Can someone help? 25 points

gregori [183]

Answer:

t ≥ 18

Step-by-step explanation:

He has run 12 miles plus some more miles t. He need to run at least 30 miles

12+t ≥ 30

Subtract 12 from each side

12+t-12 ≥ 30-12

t ≥ 18