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3 years ago

5

Urgent Help needed w/ right triangle trig

2 answers:

Zigmanuir [339]3 years ago

7 0

sin(73)=x/19

x= 18.169...

Answer is 18.2 feet

svet-max [94.6K]3 years ago

3 0

So if we have a right triangle with a 19ft hypotenuse or ladder, and it makes a 73deg angle with the ground. So we can use the sine of the angle to find the height.

sin(73)=y/19
y=19sin(73)
y=18.2ft is the height

Hope this helps. Any questions please just ask. Thank you.

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Find the interest principle 8000 rate .06 compounded annually years 3

HACTEHA [7]

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7 0

3 years ago

Last questions, plz help

Goryan [66]

Answer:

9. $a_n=7+6n$

10. $a_n=a_{n-1}+7$

Step-by-step explanation:

9. Given the sequence

$13, 19, 25, ...$

In this sequence,

$a_1=13\\ \\a_2=19\\ \\a_3=25\\ \\...$

Note that

$a_2-a_1=19-13=6\\ \\a_3-a_2=25-19=6,$

then the common difference in this sequence is $d=6$

You have

$a_1=13\\ \\d=6,$

then the explicit formula is

$a_n=a_1+(n-1)d\\ \\a_n=13+(n-1)\cdot 6\\ \\a_n=13+6n-6\\ \\a_n=7+6n$

10. Given the sequence

$-10,-3, 4, 11, ...$

In this sequence,

$a_1=-10\\ \\a_2=-3\\ \\a_3=4\\ \\a_4=11\\ \\...$

Note that

$a_2-a_1=-10-(-3)=-10+3=-7\\ \\a_3-a_2=-3-4=-7\\ \\a_4-a_3=11-4=7,$

then the common difference in this sequence is $d=7$

You have

$a_1=-10\\ \\d=7,$

then the recursive formula is

$a_n=a_{n-1}+d\\ \\a_n=a_{n-1}+7$

5 0

3 years ago