A^2 = b^2 + c^2 - 2bc cos a

= 11^2 + 5^2 - 2*5*11 cos 40

= 7.86 to 2 DP's

to find the remaining angles use the sine rule:-
a / sin A = b / sin B so

7.857/ sin 40 = 11 / sin B
sin B = 11 sin40 / 7.857 = 0.8999

<B = 64 degrees

so <C = 180 - 64-40 = 76 degrees

5 0

2 years ago

Can anybody write and explain this please?

Levart [38]

Answer:38

Step-by-step explanation:

6 0

2 years ago

What is 5the answer 5t=t/45

Alexeev081 [22]

$5t=\dfrac{t}{45}\\
225t=t\\
224t=0\\
t=0$

7 0

3 years ago

If you flip the five coins, and the probability of one coin being "tails" is 0.50, what is the probability of getting "tails" on

jenyasd209 [6]

Answer: 0.03125

Step-by-step explanation:

We know that the probability of getting a tail , we toss a fair coin = 0.5

Given : Total number of trials = 5

Using binomial probability formula :

$P(x)=^nC_xp^x(1-p)^{n-x}$ , where P(x) is the probability of getting success in x trails, n is total number of trials and p is the probability of getting success in each trial.

The probability of getting "tails" on all five coins :_

$P(x=5)=^5C_5(0.5)^5(1-0.5)^0=(1)(0.5)^5=0.03125$

Hence, the probability of getting "tails" on all five coins =0.03125

8 0

3 years ago