Answer:
50°
Step-by-step explanation:
In an inscribed quadrilateral, the opposite angles are supplementary (angle sum = 180).
2x + 80 = 180
2x = 100
x = 50
(a) there are 8C2 = 28 ways of picking 2 girls from 8
And there are 21C4 = 5985 ways of picking 4 boys
Required number of ways for 2g / 4b = 28 * 5985 = 167,580
(b) at least 2 girls means combinations of 2g/4b , 3g,3b , 4g/2b , 5g 1b or
6 girls.
2g/4b = 167,580 ways
3g/3b = 8C3 * 21C3 = 56 * 1330 = 74,480
4g/2b = 8C4* 21C2 = 70 * 210 = 14,700
5g 1b = 8C5* 21 = 56*21 = 1176
6 girls = 8C6 = 28
adding these up we get the answer to (b) which is 257,964
It’s C / what other ratios could you use?
Answer: 4
Step-by-step explanation:
In general, the exponential growth function is given by the formula below

Where a and r are constants, and x is the number of time intervals.
In our case, n=0 for 1960; therefore, 1968 is n=8,

And 1976 is n=16

Solve the two equations simultaneously, as shown below

Solving for a,

a) Thus, the equation is

b) 1960 is n=0; thus,

The answer to part b) is $1.113043... per hour
c)1996 is n=36

The model prediction is above $5.15 by $0.55 approximately. The answer is 'below'