1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
-BARSIC- [3]
2 years ago
5

Please help, I dont know what formula to use. BC=?

Mathematics
1 answer:
vladimir1956 [14]2 years ago
5 0

Answer:

17

Step-by-step explanation:

Note angle B = 180 - 51 - 39 = 90°

Use sin(39) = BC/27

OR cos(51) = BC/27

Get BC = 17

You might be interested in
What is a rational number between 10.2 and 10.3
ycow [4]
Hola!

A rational number could range from 10.21 to 10.2001

Hope that helped :)
4 0
3 years ago
Read 2 more answers
Which of the following expressions is 0.00012 written in scientific notation? A. 0.12 × 10^-3 B. 1.2 × 10^-4 C. 12 × 10^-5 D. 1.
In-s [12.5K]

Answer:

B. 1.2 x 10^{-4}

Step-by-step explanation:

Scientific notation is a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8.  Or, in this case it's the opposite since we have a negative number. Since it's a decimal it's multiplied by 10 still but the exponent is negative. All we need to do to find what the exponent would be in this case is to count the number of zeros before the "12." There are 4 zeros before the 12. So your exponent would be -4. Now all we need to do is write out "equation" per say.

1.2 x 10^-4

<u>Hope this helps and have a nice day!</u>

5 0
2 years ago
Read 2 more answers
What is the reciprocal Consider the expression (5) of the base? Write your answer as a fraction, using the / symbol, like this:
lora16 [44]
Reciprocal of a fraction<h2>Answer</h2>

8/7

<h2>Explanation</h2>

In this case, the base is 7/8 and the exponent is -4.

In order to find the reciprocal of a fraction we just have to flip it upside down:

That is why the answer is 8/7.

3 0
1 year ago
Once a commercial plane reaches the desired altitudes, the pilot often travels at a crushing speed. On average, the cruising spe
sweet [91]
I know it may be too late, but maybe it will eventually help you or someone else.

If a plane travels with a speed of 570 miles per hour for 7 hours, then he will travel 570 * 7 = 3990 miles in that time.

6 0
3 years ago
Read 2 more answers
I NEED HELP ASAP!! WILL GET 15 POINTS FOR THE CORRECT ANSWER!!!
Elanso [62]
All real numbers such that y is greater than 3/17 or y>3/17. Hope this helps!!!!

7 0
3 years ago
Other questions:
  • What equals 19 in multiplication
    10·2 answers
  • anne has 24 more cards than devi. anne finds that 3/5 of devi's cards are equal to 1/2 of her cards. how many cards does anne ha
    13·2 answers
  • Which property would be useful in proving that the product of two rational numbers is ALWAYS rational? A) a b + c d = ad + bc bd
    10·2 answers
  • Adjacent angles of intersecting lines are complementary angles. true false
    5·2 answers
  • 11 cm<br> 7 cm<br> 4 cm<br> What is the volume of the right rectangular prism?
    6·1 answer
  • What’s the measure of angle c?<br><br><br> Some please answer fast. Please.
    9·1 answer
  • QUESTION 5 of 10: You have a choice of a $2,000 rebate on a $13,000 vehicle or 18% off. Which is better?
    8·1 answer
  • Angle
    11·1 answer
  • Hi guys a joke what does cow celebrate?
    8·1 answer
  • What is the answer, i need help
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!