Two planes approach each other head-on. Each has a speed of and they spot each other when they are initially 10.0 km apart. How much time do the pilots have to take evasive action?

23.08 seconds

Explanation:

The computation of the time required is shown below

Relative Velocity,V is

= 780 - ( - 780)    

= 1560 km/h

As it is moving in inverse or an opposite direction

And, the Distance, D = 10 km

So the time is

= 0.00641 hours

=

= 23.08 seconds

By dividing the distance from the relative velocity we can get the time and the same is to be taken in the computation part

260 miles per hour

explanation:

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50