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katrin [286]
2 years ago
6

The security alarm on a parked car goes off and produces a frequency of 951 hz. the speed of sound is 343 m/s. as you drive towa

rd this parked car, pass it, and drive away, you observe the frequency to change by 99 hz. at what speed are you driving?
Mathematics
1 answer:
AVprozaik [17]2 years ago
7 0
951hz divide by 343m/s = <span>2.77259475
times the answer by 99hz = </span><span>274.48688
to 1 d.p is 274.5m/s</span>
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A jet plane can carry up to 200,000 liters of fuel. It used 130,000 liters of fuel during a flight. What percentage of the fuel
-Dominant- [34]

Given:

Capacity of jet plane = 200,000 liters of fuel

Fuel used during flight = 130,000 liters

To find:

The percentage of the fuel capacity it uses on this flight.

Solution:

According to the question, we need to find 130,000 is what percent of 200,000.

\text{Required percentage}=\dfrac{\text{Fuel used during flight}}{\text{Capacity of jet plane}}\times 100

\text{Required percentage}=\dfrac{130000}{200000}\times 100

\text{Required percentage}=65

Therefore, the jet plane uses 65 percent of fuel capacity during flight.

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3 years ago
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uysha [10]

Answer:

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Step-by-step explanation:

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2 years ago
ANSWER ASAP PLZ
IRISSAK [1]

Answer:

BC=QR

Step-by-step explanation:

conditions to be congruent, SSS, SAS, or ASA

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