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lesya [120]
3 years ago
8

Multiply.round your answer to the nearest tenth 3×2.5×1.05. A.7.9 B.8.0 C.11.25 D.11.3

Mathematics
2 answers:
dangina [55]3 years ago
7 0
3 x 2.5 = 7.5
7.5 x 1.05 = 7.8750

Note : remember to always line up the decimal points.

Hope this helps

DedPeter [7]3 years ago
7 0
3 x 2.5 x 1.05 = 7.875

7.875 when rounded to the nearest tenth is 7.9

Therefore, the answer would be letter A. 7.9
:)
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Cellular phone service that charges per-minute will charge $70 for 270 minutes. How much would 1260 minutes cost? Round your ans
gulaghasi [49]
$70 = 270 min
x = 1260 min
Where x is the charge of phone service per 1260 min.

Cross multiply:
1260 * 70 = 270 * x
88200 = 270x
88200/270 = x
x = 326.67

The total charge of cellular phone service for 1260 min is $326.67
6 0
2 years ago
So I'm in an online class of geometry and one of the units is trig. but no matter how long i keep learning or trying to learn th
Arturiano [62]

Answer and explanation:

There are six main trigonometric ratios, namely: sine, cosine, tangent, cosecant, secant, cotangent.

Those ratios relate two sides of a right triangle and one angle.

Assume the following features and measures of a right triangle ABC

  • right angle: B, measure β
  • hypotenuse (opposite to angle B): length b

  • angle C: measure γ
  • vertical leg (opposite to angle C): length c

  • horizontal leg (opposite to angle A): length a
  • angle A: measure α

Then, the trigonometric ratios are:

  • sine (α) = opposite leg / hypotenuse = a / b
  • cosine (α) = adjacent leg / hypotenuse = c / b
  • tangent (α) = opposite leg / adjacent leg = a / c

  • cosecant (α) = 1 / sine (α) = b / a
  • secant (α) = 1 / cosine (α) = b / c
  • cotangent (α) = 1 / tangent (α) = c / b

Then, if you know one angle (other than the right one) of a right triangle, and any of the sides you can determine any of the other sides.

For instance, assume an angle to be 30º, and the lenght of the hypotenuse to measure 5 units.

  • sine (30º) = opposite leg / 5 ⇒ opposite leg = 5 × sine (30º) = 2.5
  • cosine (30º) = adjacent leg / 5 ⇒ adjacent leg = 5 × cosine (30º) = 4.3

Thus, you have solved for the two unknown sides of the triangle. The three sides are 2.5, 4.3, and 5.

7 0
2 years ago
The price of a small pizza increased from $6 to $9 what is the percent of increase in the cost of the pizza? Round to the neares
horrorfan [7]

Answer:

50%

Step-by-step explanation:

Since it was $6, half of $6 is $3. So, $6 to $9 is a $3 difference, which is 1/2. 1/2 is a 50% increase.

7 0
3 years ago
Can you solve the equation?
Andreas93 [3]

Answer:

x=3 and 9

Step-by-step explanation:

; x-3=0

x=3 (change side change mark)

and

\frac{2}{3} x - 6 = 0

\frac{2}{3} x = 6

x = 6 \times  \frac{3}{2}

change side change mark.

So, x=9

If u wanna check the answer you can check by substitution x=3 and 9 in equation.

hope it helps you ☺️

3 0
3 years ago
The volume of a rectangular prism is 48 cubic meters. It is 6 meters long and 2 meters wide.
horsena [70]

Answer:

12m^2

Step-by-step explanation:

volume = 48 m^3

l*b*h = 48

12*h = 48

h = 4 m

baSe of prism will be made of l and b

so area is 12 m^2

8 0
2 years ago
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