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2 years ago

9

An element with mass 210 grams decays by 8.3% per minute. How much of the element is remaining after 15 minutes, to the nearest

10th of a gram?

1 answer:

alexandr1967 [171]2 years ago

0 0

Answer:

57.2 g

Step-by-step explanation:

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4.5m is ____ % of 90 cm; 90 cm is ____ % of 4.5m

Burka [1]

Answer: 5%

Step-by-step explanation:

Firstly, Convert metre to centimetre

100cm = 1m

Therefore,

4.5m = 450cm

If 450cm is X% of 90cm

That becomes :

450= X% × 90

450= 90X%

X% = 450/90

X% = 5%

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A car travels 15 kilometers west in 10 minutes. After reaching the destination, the car travels back to the starting point, agai

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Your answer to your question is C

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The 30 members of a choir are trying to raise at least $1,500 to cover travel costs to a singing camp. They already have $600. W

ryzh [129]

The choir members need $1500, but they have $600. Therefore, they need $1500-$600=$900 more.

Call a the average amount raised by a member. We see that 30a >= $900. Dividing by 30, we find that a >= $30, so the average member must raise at least $30.

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2 years ago

A train is traveling at a constant speed of 105 miles per hour. How many feet does it travel in 4 seconds? Remember that 1 mile

Alex73 [517]

9240ft per second

(105mi/1hr * 5280ft/1mi * 1hr/60sec)

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A side of a regular six - sided polygon is 8cm long. The perimeter of a similar polygon is 60cm. What is the length of a side of

Lerok [7]

Answer:

10 cm

Step-by-step explanation:

The larger polygon is also a regular 6-sided polygon, so each side is 1/6 of the perimeter length:

(60 cm)/6 = 10 cm . . . length of a side

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2 years ago