From the equilateral (60-60-60) triangle with all legs of length 1, we can view half the triangle, forming a 30-60-90 triangle, with the hypotenuse measuring 1, the short leg1/2<span>, and the long leg 3 2. Therefore, we have sin 30° = </span>1/2<span>, cos 30° = 3 2, sin 60° = 3 2 and cos 60° = </span>1/2<span>.
i hope this help</span>
The key to solving this is to look at the 24 and the 28. First, look at option <span>A.4:74:7
To have 28 equal to 7, you need to divide by 4. But 24 divided by 4 equal 6, so option A doesn't work.
Option B, </span><span>12:1612:16. To have 24 equal to 12, divide by 2. But 28 divided by 2 is 14, not 16. Option B doesn't work either.
Now Option D. </span><span>48:5848:58 To have 24 equal to 48, multiply by 2. But 28 multiplied by 2 is 56, not 58. Option D does not work.
This only leaves option C.</span>
Answer:
1
Step-by-step explanation:
using the rule of exponents
= 1 , then
= 1
Cause you have the slashes and 2/4/5/6/7and 3/4/5/6/7
David's score on his fifth test would be an 87. If you add up all the scores from his first to his fourth test, it would 363. However, since there are five tests, in order to get a 90 percent, the sum of all five test scores would be 450. 450 - 363 = 87.
