All categories

3 years ago

(Day 8) Find the value of each variable. The dot represents

Mathematics

1 answer:

mario62 [17]3 years ago

6 0

Answer:

Step-by-step explanation:

a=180-122=58°

Let ABC be the triangle in which BC is diameter.

Diameter always make angle 90° on the circumference.

so b=90°

∠B=1/2×58=29°

29+b+c=180

29+90+c=180

c=180-119=61°

You might be interested in

169/13 draw a quick picture with base ten blocks explain

Kitty [74]

I wish i could show u how to work it out but just do it or work it out the same way as the fractional numbers.

7 0

3 years ago

In 2000, the population of a county was 25,300,987. The population decreased at a rate of 2% each year. What was the population

EastWind [94]

Answer: In 2008 the population was 21,525,144

Step-by-step explanation:

You need to use the following formula for Exponential decay:

$P=P_0(1-r)^t$

Where $P_0$ is the initial population in the year 0, $r$ is the rate of decay and $t$ is the time.

In this case, you can identify that:

$P_0=25,300,987\\\\r=2\%\\\\t=8$

Therefore, substituting these values into the formula for Exponential decay, you get:

$P=P_0(1-r)^t\\\\P=(25,300,987)(1-\frac{2}{100})^8\\\\P=21,525,144$

Then, in 2008 the population was 21,525,144

6 0

2 years ago

Compare the number of friends at the beginning of a month and at the end of that month if it decreased by 60 and increased by 80

inn [45]

Answer:

plus 20 or positive

Step-by-step explanation:

-60+80= 20

positive

3 0

2 years ago

Suppose a normal distribution has a mean of 50 and a standard deviation of 3. What is P(x≤53)?

Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

Use the formula to find the z-score, then go to the table that will give you the probability that the value is less than this z-score.

$z=\frac{53-50}{3}=1$

The probability that the value lies to the left of 1 on a standard bell curve is 84.1345%, or 84%, the third choice down.

5 0

2 years ago

8 + (-10) just confused lol

grin007 [14]

8+(-10) is like 10-8 except backwards so how i do some problems is like that and then add a negative sign; so say if i were doing 8+(-10), i would do 10-8 which equals 2 and then since 10 is bigger than 8 and it’s a negative number, i would put -2 as my answer

5 0

2 years ago