4x3^4 10 points HELP!!!!!!

Mathematics

2 answers:

svp [43]3 years ago

7 0

Answer:324

Step-by-step explanation:evaluate the power so 4x81 then multiply

Soloha48 [4]3 years ago

5 0

Answer:

2 ^ 2 x ^81

Step-by-step explanation:

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A car's rear windshield wiper rotates 130°. The total length of the wiper mechanism is 25 inches and the length of the wiper bla

Delicious77 [7]

The area wiped by the viper blade is approximately 486.7 square inches.

The area wiped by the wiper blade ( $A$ ), in square inches, is equal to the area of the circular section described below:

$A = \frac{\theta\cdot \pi}{360}\cdot (R^{2}-r^{2})$ (1)

Where:

$\theta$ - Angle, in sexagesimal degrees.
$r$ - Inner radius, in inches.
$R$ - Outer radius, in inches.

If we know that $\theta = 130^{\circ}$ , $R = 25\,in$ and $r = 14\,in$ , then the area wiped by the wiper blade is:

$A = \frac{130\pi}{360} \cdot [(25\,in)^{2}-(14\,in)^{2}]$

$A \approx 486.7\,in^{2}$

The area wiped by the viper blade is approximately 486.7 square inches.

We kindly invite to check this question on circular sections: brainly.com/question/14989543

8 0

3 years ago

Need help on 9 don’t know if I did it right or not but I need help :p

solmaris [256]

Answer:

9b) -8 = y

9a) 72° = m∠ABC

Step-by-step explanation:

Since you have an angle trisector, in this case, m∠CBE ≅ m∠DBA, therefore you set x equal to 8, plus, according to Morley's Trisector Theorem, all three angles form an equilateral triangle, so m∠BOC also has to equal 24°:

${8}^{2} - 5(8) = 64 - 40 = 24 \\ \\ 6(8) - 24 = 48 - 24 = 24 \\ \\ 2(8) - y = 24 >> 16 - y = 24 >> -8 = y$