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Evgesh-ka [11]
3 years ago
15

What is 0.25 in scientific notation ?

Mathematics
1 answer:
geniusboy [140]3 years ago
5 0
2.5 × 10 ↑ -1
Because it moves the decimal place one spot over to the left (because the one is negative), making it 0.25 once again.
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3 x 10^8/3.4 x 10^2 solved
storchak [24]

Answer: See explanation

Step-by-step explanation:

3 × 10⁸ ÷ 3.4 × 10²

(3 × 100000000) ÷ (3.4 × 100)

300000000 ÷ 340

882352.94117

Round to the nearest hundredth

882352.94117 ≈ 882352.94

Round to the nearest tenth

882352.94117 ≈ 882352.9

Round to the nearest whole number

882352.94117 ≈ 882353

Hope I helped!

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3 years ago
Wich one of the following items is an exmple of software?
saul85 [17]
A) Word-processing program is an example of a software
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Help me with this pls
SSSSS [86.1K]

Answer:

1/625 or 0.0016

Step-by-step explanation:

5 0
3 years ago
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A motorcyclist leaves City A and rides at a constant speed towards City B, which is 225 km away. After 1.5 hours, the motorcycli
rewona [7]

Answer:

50 km/hr

Step-by-step explanation:

OK, this is how I solved this problem.

Let r = original rate of speed

     t = time after the stop to finish the trip

Time for trip without stopping is 225/r

(1)     1.5 + .5 + t = 225/r      This is a time equation

(2)    1.5r + t(r + 10) = 225     This is a distance equation

(1)       2 + t = 225/r            (2)      1.5r + tr + 10t = 225

         2r + tr = 225

                tr = 225 - 2r                 1.5r + 225 - 2r + 10(225/r - 2) = 225

                t = 225/r - 2

                                                   -.5r + 225 + 2250/r - 20 = 225

                                                     -5r + 2250 + 22500/r - 200 = 2250

                                                     -5r^2 + 2250r + 22500 - 200r = 2250r

                                                       5r^2 + 200r - 22500 = 0

                                                       5(r^ + 40r - 4500) = 0

                                                           5(r - 50)(r + 90) = 0

                                                                 r = 50   or    r = -90

The rate cannot be negative, so the original speed 50 km/hr

This not an easy problem and I hope you were able to follow my work

5 0
3 years ago
Read 2 more answers
If Ray earns $120 for 15 hours of work how much will he earn for 20 hours of work at the same rate​
Free_Kalibri [48]
Find his rate:
120 / 15 = $8 per hour
Multiply the rate by hours:
$8 x 20 hours = $160
He will earn $160
8 0
2 years ago
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