14. An airplane begins its descent at 15 miles above the ground. After 15 minutes, the airplane ismile above the ground. Find the change in
height of the airplane. If the airplane continues to descend at this rate, how
long does the entire descent last?

Solution

verified

Verified by Toppr

Height of aeroplane =BD=CE=1500

3

m and

∠BAE=60

0

and CAE=30

0

In triangle ADB

tan60

0

=

AD

1500

3

⇒

3

=

AD

1500

3

⇒AD=1500 m

In triangle CAE

tan30

0

=

AE

1500

3

⇒

3

1

=

AD

1500

3

⇒AE=1500×3=4500 m

Distance covered by plane in 15 seconds: BC=DE=AE−AD=4500−1500=3000 m

Speed of aeroplane =

15

3000

=200 m/s=720 km/hr

sites:

part d

step-by-step explanation:

theresa talked her parents into getting sd cards for her phone and her brother’s phone. inserting an sd card into a phone gives it more storage. they both get 8-gigabyte sd cards. how many bits of storage come with each sd card? type your answer in both scientific and standard notation.