images in template files

// first method
<img src="<?php echo get_stylesheet_directory_uri(); ?>/img/taxi-photo-about.jpg"/>

// second method
<?php $image_src = wp_get_attachment_url(47459, 'full'); ?>
<img src="<?php echo $image_src; ?>"/>

// third method
<?php $image_id = 47603;
echo wp_get_attachment_image($image_id, 'full' ); ?>

// With ACF - if you have the 'pro' version, you can create an options page variable for your client to use in a 404 page.

// Not recommended as this path will break upon migrating
<img src="http://localhost/accelerate/wp-content/uploads/2006/11/IMG_3231.jpg"/>