Answer:
0.53 mph
Step-by-step explanation:
A cyclist travels 8 miles in 15 minutes.
So the average speed is
=8/15 mph
=0.53 mph
Answer:
65%
Step-by-step explanation:
Make it a fraction:
Divide 13 by 20:
13÷20
Write it as a decimal:
0.65
Move the decimal 2 places to the right:
6.5
65.
Put the percent sign at the end:
65%
If the guppies multiply by four in six months then that 4 raised to the power of six. Then multiply it with the starting number of guppies which is 6Formula=4^6 (6)4096 x 6= 24576
So, there are 24, 576 guppies in six months. The answer is A.
hope dis helps
7 8 9 10 11 12 13 14 15 16 17 18 19 20
Answer:
4 d
Step-by-step explanation:
Given D is mid-point of BC and AD⊥AC
From right angle △DAC
cosC=
a/2
b
=
a
2b
...(i)
also from cosine formulae
cosC=
2ab
a
2
+b
2
−c
2
...(ii)
From (i) and (ii) we get
a
2b
=
2ab
a
2
+b
2
−c
2
⇒4b
2
=a
2
+b
2
−c
2
⇒b
2
=
3
a
2
−c
2
∴cosAcosC=
2bc
b
2
+c
2
−a
2
.
a
2b
=
ca
[(
3
a
2
−c
2
)+c
2
−a
2
]
=
3
2
(
ca
c
2
−a
2
)