Answer:
1.98 × 10^10
Step-by-step explanation:
First solve for how many text messages were sent out per one month:
22,000,000 × 900
19,800,000,000
Convert into scientific notation:
1.98 × 10^10
In scientific notation, there can only be one number before the decimal. The rest of the numbers must be after the decimal; hence, why I put the numbers 9 and 8 after the decimal. If the rest of the numbers are zeros, you do not have to add them after the decimal. Instead, starting from right to left, count the number places until you reach your decimal. The number you have counted will be your exponent. I counted nine 0's, one 8, and one 9 which made this exponent 10 as there were 10 decimal placements.
Answer:

Step-by-step explanation:
let the unknown number be = x

<h3>bring 175/100 to the right-hand side and change its symbol to ÷ </h3>

<h3>

</h3>
Answer: 1. 54, 2. 48
Step-by-step explanation: To find the area of a trapezoid you add the top base and the bottom base then divide them by two, and multiply them by the height.For #1. 8+10/2= 9 then 9x6=54 For #2. 4+12/2=8 then 8 x 6=48.
Answer:
Fig.2⇒ x = 10.642
Fig.3⇒ x = 32.005°
Fig.4⇒ x = 41.810°
Fig.5⇒ x = 9.419
Fig.6⇒ x = 42.844
Fig.7⇒ x = 45.573°
Step-by-step explanation:
We will use the trigonometry functions
∵ Δ Is a right angle triangle in all figures:
Figure(2) ∵ cos20° = 10/x
∴ x = 10/cos20° = 10.642
Figure(3) ∵ tanx = 5/8
∴ x =
= 32.005°
Figure(4) ∵ sinx = 10/15
∴ x =
= 41.810°
Figure(5) ∵ sin48° = 7/x
∴ x = 7/sin48° = 9.419
Figure(6) ∵ tan35° = 30/x
∴ x = 30/tan35° = 42.844
Figure(7) ∵ cosx = 14/20
∴ x =
= 45.573°