What the answer please?

Mathematics

2 answers:

NISA [10]3 years ago

8 0

A ) 40° because an acute angle is less than a 90° angle.. so on a protractor it should be more than 0° but less than 90°.

Rus_ich [418]3 years ago

4 0

The definition of an acute angle is one where the angle measurement, obtained by looking at the measure between 2 legs or terminals in a quadrant would be one where the angle measure is less than 90 degrees, anywhere from 0 - 90 not including 90 would be an acute angle.

In this case, it would be A. 40 degrees.

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Julian is using a biking app that compares his position to a simulated biker traveling Julian's target speed. When Julian is beh

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Answer:

$\large \boxed{\text{11 km/h}}$

Step-by-step explanation:

1. The situation after 15 min:

(a) Distance travelled by simulated biker:

15 min =¼ h

$\text{Distance} = \dfrac{1}{4}\text{ h} \times \dfrac{\text{20 km}}{\text{1 h}} = \text{5 km}$

(b) Distance travelled by Julian

Julian is 2¼ km behind the biker. The distance he has travelled is (5 - 2¼) km

5 - 2¼ = 5 - ⁹/₄ = ²⁰/₄ - ⁹/₄ = ¹¹/₄ = 2¾

Julian has travelled 2¾ km in ¼ h.

2. Julian's average speed

$\text{Speed} = \dfrac{\text{Distance}}{\text{Time}} = \dfrac{2\frac{3}{4}\text{ km}}{\frac{1}{4}\text{ h}} =\dfrac{11}{4}\text{ km}\times \dfrac{4}{\text{1 h}} = \textbf{11 km/h}\\\\\text{Julian's average speed is $\large \boxed{\textbf{11 km/h}}$}$